:root {
  /* Design tokens: Inter* Inter** short explanatory passages; IBM Plex Mono* Mono** revision IDs. */
  --asphalt: #111827;
  --bubblegum: #FF4FD8;
  --lemon: #FFF338;
  --cyan: #00D7FF;
  --melon: #FF7A3D;
  --mint: #6BFFB8;
  --lilac: #B8A5FF;
  --display: "Bebas Neue", Impact, sans-serif;
  --body: "Inter", system-ui, sans-serif;
  --mono: "IBM Plex Mono", "Courier New", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--asphalt);
  color: white;
  font-family: var(--body);
  overflow-x: hidden;
}

.city-film { background: radial-gradient(circle at 50% 5%, rgba(0, 215, 255, .18), transparent 28%), var(--asphalt); }
.scene {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  isolation: isolate;
}

.hero-scene {
  perspective: 900px;
  background:
    linear-gradient(180deg, rgba(17,24,39,.7), var(--asphalt) 72%),
    radial-gradient(circle at 25% 20%, rgba(255,79,216,.32), transparent 22%),
    radial-gradient(circle at 80% 12%, rgba(255,243,56,.25), transparent 18%);
}

.sky-glow {
  position: absolute;
  inset: -20% -10% 30%;
  background: conic-gradient(from 210deg, transparent, rgba(184,165,255,.28), rgba(0,215,255,.25), transparent);
  filter: blur(28px);
  animation: skyPulse 7s ease-in-out infinite alternate;
}

.canyon {
  position: absolute;
  inset: 6vh 4vw 12vh;
  transform-style: preserve-3d;
  transform: rotateX(10deg) translateZ(0) scale(var(--push, 1));
  transition: transform .25s linear;
}

.building {
  position: absolute;
  bottom: 0;
  border: 3px solid rgba(255,255,255,.08);
  box-shadow: 0 0 60px rgba(0,215,255,.18), inset 0 0 80px rgba(0,0,0,.45);
}

.building-left {
  left: 0;
  width: 28vw;
  height: 78vh;
  background: linear-gradient(140deg, #17223a, #241b46 54%, #111827);
  transform: skewY(-8deg) rotateY(18deg);
}

.building-center {
  left: 27vw;
  width: 46vw;
  height: 68vh;
  padding: 5vh 3vw;
  background: linear-gradient(160deg, #171f35 0%, #28355f 56%, #111827 100%);
  transform: translateZ(-120px);
  text-align: center;
}

.building-right {
  right: 0;
  width: 27vw;
  height: 82vh;
  background: linear-gradient(220deg, #1a2441, #372151 58%, #111827);
  transform: skewY(8deg) rotateY(-18deg);
}

h1, h2, h3, .vertical-sign, .district-title h2, .rooftop-signs span { font-family: var(--display); font-weight: 400; letter-spacing: .03em; }
h1 {
  margin: 0;
  font-size: clamp(5.8rem, 17vw, 18rem);
  line-height: .78;
  color: var(--lemon);
  text-shadow: 8px 8px 0 var(--bubblegum), -6px -5px 0 var(--cyan), 0 0 38px rgba(255,243,56,.45);
}
h1 em { color: var(--mint); font-style: normal; }

.facade-code, .mono, .kicker { font-family: var(--mono); }
.facade-code { color: var(--cyan); font-size: clamp(.75rem, 1.3vw, 1rem); }
.screen-badge, .awning, .rooftop-map {
  position: absolute;
  font-family: var(--mono);
  color: var(--asphalt);
  background: var(--lemon);
  padding: .6rem .8rem;
  box-shadow: 8px 8px 0 var(--melon);
}
.screen-badge { right: 2vw; bottom: 4vh; }
.awning { left: 2vw; bottom: 7vh; }
.rooftop-map { right: 2vw; top: 12vh; background: var(--mint); }

.vertical-sign {
  position: absolute;
  top: 4vh;
  left: 1.2vw;
  writing-mode: vertical-rl;
  font-size: clamp(4rem, 9vw, 10rem);
  color: var(--bubblegum);
  text-shadow: 0 0 24px var(--bubblegum);
}
.vertical-sign.rotate { left: auto; right: 1.2vw; color: var(--cyan); }

.window-grid {
  position: absolute;
  inset: 20% 16% 20% 38%;
  background-image: linear-gradient(90deg, transparent 72%, rgba(255,243,56,.8) 73%), linear-gradient(0deg, transparent 72%, rgba(184,165,255,.75) 73%);
  background-size: 48px 42px;
  opacity: .75;
}
.window-grid.small { inset: 22% 32% 24% 12%; background-size: 38px 36px; }

.bracket-signal {
  position: absolute;
  top: 16vh;
  z-index: 6;
  font: 700 clamp(3rem, 8vw, 8rem) var(--mono);
  color: var(--bubblegum);
  text-shadow: 0 0 18px var(--bubblegum), 0 0 50px var(--bubblegum);
  animation: blinkSignal 1.25s steps(2, end) infinite;
}
.signal-left { left: 6vw; }
.signal-right { right: 6vw; animation-delay: .35s; }

.street-lines { position: absolute; inset: auto 0 0; height: 72vh; z-index: 2; }
.street-edge { fill: none; stroke: rgba(184,165,255,.45); stroke-width: 4; stroke-dasharray: 18 18; }
.route-line, .draw-route { fill: none; stroke: var(--cyan); stroke-width: 8; stroke-linecap: round; filter: drop-shadow(0 0 10px var(--cyan)); stroke-dasharray: 1200; stroke-dashoffset: var(--dash, 1200); }
.hero-route { stroke: var(--bubblegum); filter: drop-shadow(0 0 13px var(--bubblegum)); }

.tutorial-cursor {
  position: fixed;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 8;
  left: var(--cursor-x, 50vw);
  top: var(--cursor-y, 45vh);
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(255,243,56,.42), rgba(255,243,56,.12) 38%, transparent 70%);
  border: 2px solid rgba(255,243,56,.65);
  mix-blend-mode: screen;
}

.projection-card, .billboard, .poster-stack, .ticket-machine, .final-slate {
  background: linear-gradient(135deg, rgba(255,243,56,.96), rgba(107,255,184,.92));
  color: var(--asphalt);
  border: 4px solid var(--asphalt);
  box-shadow: 14px 14px 0 var(--bubblegum), 0 0 36px rgba(255,243,56,.38);
}
.projection-card { position: absolute; max-width: 430px; padding: 1.3rem; z-index: 10; opacity: 0; transform: translateY(20px) rotate(-1deg); transition: .7s ease; }
.projection-card.is-visible, .scene.in-view .projection-card { opacity: 1; transform: translateY(0) rotate(-1deg); }
.hero-caption { left: 6vw; bottom: 9vh; }
.kicker { display: block; font-size: .78rem; color: #111827; margin-bottom: .35rem; }
.projection-card h2, .billboard h3, .poster-stack h3, .ticket-machine h2, .final-slate h2 { margin: 0; font-size: clamp(2.6rem, 6vw, 5.5rem); line-height: .88; }
.projection-card p, .billboard p, .poster-stack p, .ticket-machine p, .final-slate p { font-weight: 800; line-height: 1.35; }

.ticket-link {
  position: absolute;
  right: 8vw;
  bottom: 11vh;
  z-index: 11;
  display: inline-block;
  padding: 1rem 1.4rem;
  color: var(--asphalt);
  background: var(--melon);
  font: 700 .9rem var(--mono);
  text-decoration: none;
  box-shadow: 8px 8px 0 var(--cyan), 0 0 26px rgba(255,122,61,.55);
}

.district { padding: 8vh 7vw; background: linear-gradient(180deg, #111827, #17203b); }
.district::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,79,216,.45) 2px, transparent 3px);
  background-size: 48px 48px;
  opacity: .16;
  transform: translateY(var(--parallax, 0px));
}
.district-title { position: relative; z-index: 3; display: flex; gap: 1rem; align-items: end; }
.district-title span { font: 700 1rem var(--mono); color: var(--lemon); }
.district-title h2 { margin: 0; font-size: clamp(5rem, 13vw, 14rem); color: var(--cyan); text-shadow: 7px 7px 0 var(--bubblegum); }

.route-map { position: absolute; inset: 20vh 3vw 4vh; z-index: 1; }
.route-map circle { fill: var(--lemon); stroke: var(--asphalt); stroke-width: 5; }
.route-board { position: absolute; right: 8vw; top: 32vh; z-index: 5; width: min(440px, 84vw); padding: 1.2rem; transform: rotate(2deg); }
.crosswalk { position: absolute; left: 0; right: 0; bottom: 10vh; display: grid; grid-template-columns: repeat(4, 1fr); gap: 2vw; transform: skewY(-7deg); }
.crosswalk i { padding: 1.2rem 0; background: white; color: var(--asphalt); font: 400 clamp(2rem, 6vw, 6rem) var(--display); text-align: center; box-shadow: inset 0 -10px 0 var(--lilac); }
.drone-guide { position: absolute; left: 13vw; top: 40vh; color: var(--lemon); font: 700 .8rem var(--mono); animation: droneFloat 3s ease-in-out infinite; }
.drone-guide span { display: block; width: 74px; height: 48px; margin-bottom: .5rem; background: var(--lilac); border-radius: 50% 50% 44% 44%; box-shadow: 0 0 0 10px rgba(184,165,255,.16), 26px 18px 0 -10px var(--lemon); }

.revision-station { background: radial-gradient(circle at 30% 20%, rgba(255,122,61,.3), transparent 28%), #111827; }
.station-clock { position: absolute; left: 8vw; top: 14vh; width: 210px; height: 210px; border-radius: 50%; display: grid; place-items: center; text-align: center; color: var(--asphalt); background: var(--lemon); border: 10px solid var(--bubblegum); font: 400 3rem var(--display); box-shadow: 0 0 32px var(--bubblegum); }
.station-clock strong { font-family: var(--mono); font-size: 1.5rem; }
.flip-billboard { position: absolute; right: 8vw; top: 15vh; width: min(620px, 82vw); height: 330px; transform-style: preserve-3d; transition: transform .8s cubic-bezier(.2,.8,.2,1); }
.scene.in-view .flip-billboard { transform: rotateY(180deg); }
.flip-face { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; padding: 2rem; backface-visibility: hidden; background: var(--cyan); color: var(--asphalt); border: 5px solid white; box-shadow: 16px 16px 0 var(--melon); }
.flip-face span { font: 700 5rem var(--mono); color: var(--bubblegum); }
.flip-face h2 { margin: 0; font-size: clamp(3.6rem, 8vw, 8rem); line-height: .88; }
.flip-back { transform: rotateY(180deg); background: var(--mint); }
.poster-stack { position: absolute; left: 19vw; bottom: 12vh; width: min(520px, 76vw); padding: 1.4rem; transform: rotate(-3deg); }
.platform-lights { position: absolute; right: 0; left: 0; bottom: 2vh; display: flex; justify-content: space-around; }
.platform-lights span { width: 8vw; height: 16px; background: var(--melon); box-shadow: 0 0 26px var(--melon); animation: platformBlink 1.6s infinite alternate; }
.platform-lights span:nth-child(even) { animation-delay: .4s; background: var(--mint); box-shadow: 0 0 26px var(--mint); }

.source-market { background: linear-gradient(160deg, #111827 35%, #241b46); }
.market-stalls { position: absolute; left: 5vw; bottom: 12vh; display: flex; gap: 1rem; z-index: 4; }
.stall { width: 180px; height: 170px; padding: 1rem; background: var(--bubblegum); color: var(--asphalt); clip-path: polygon(0 18%, 10% 0, 20% 18%, 30% 0, 40% 18%, 50% 0, 60% 18%, 70% 0, 80% 18%, 90% 0, 100% 18%, 100% 100%, 0 100%); box-shadow: 10px 10px 0 var(--cyan); }
.stall b { display: block; margin-top: 2rem; font: 400 3.2rem var(--display); }
.stall span { font: 700 .8rem var(--mono); }
.stall.mint { background: var(--mint); }
.stall.orange { background: var(--melon); }
.citation-tower { position: absolute; right: 9vw; top: 8vh; width: 34vw; height: 82vh; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; padding: 2rem; background: linear-gradient(180deg, #1d2745, #111827); border: 4px solid rgba(255,255,255,.1); transform: skewY(-4deg); }
.citation-tower span { background: rgba(184,165,255,.2); border: 2px solid rgba(255,255,255,.08); transition: .35s ease; }
.scene.in-view .citation-tower span { background: var(--lemon); box-shadow: 0 0 24px var(--lemon); }
.scene.in-view .citation-tower span:nth-child(2n) { background: var(--mint); box-shadow: 0 0 24px var(--mint); }
.scene.in-view .citation-tower span:nth-child(3n) { transition-delay: .18s; }
.scene.in-view .citation-tower span:nth-child(4n) { transition-delay: .34s; }
.market-card { left: 7vw; top: 12vh; }

.index-rooftop { background: radial-gradient(circle at 70% 10%, rgba(0,215,255,.28), transparent 26%), #111827; }
.subway-panel { position: absolute; left: 8vw; right: 8vw; top: 12vh; bottom: 15vh; padding: 2rem; background: #e9f8ff; color: var(--asphalt); border: 8px solid var(--asphalt); box-shadow: 18px 18px 0 var(--lilac); transform: translateY(70px); transition: .8s ease; }
.scene.in-view .subway-panel { transform: translateY(0); }
.subway-panel h2 { margin: 0; font-size: clamp(5rem, 12vw, 13rem); color: var(--asphalt); }
.subway-panel svg { position: absolute; inset: 32% 5% 8%; width: 90%; height: 55%; }
.subway-panel path { fill: none; stroke-width: 18; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 900; stroke-dashoffset: var(--dash, 900); transition: stroke-dashoffset 1.2s ease; }
.scene.in-view .subway-panel path { stroke-dashoffset: 0; }
.cyan-line { stroke: var(--cyan); }
.pink-line { stroke: var(--bubblegum); }
.yellow-line { stroke: var(--lemon); }
.rooftop-signs { position: absolute; left: 9vw; right: 9vw; bottom: 5vh; display: flex; justify-content: space-between; }
.rooftop-signs span { color: var(--lemon); font-size: clamp(2.3rem, 5vw, 6rem); text-shadow: 5px 5px 0 var(--bubblegum); }

.archive-underpass { background: linear-gradient(180deg, #17203b, #090d17); }
.underpass-tunnel { position: absolute; inset: 10vh 5vw 8vh; border-radius: 50% 50% 0 0 / 24% 24% 0 0; border: 16px solid #2b3554; background: repeating-radial-gradient(ellipse at 50% 110%, #111827 0 45px, #1b2440 48px 78px); box-shadow: inset 0 0 80px black; }
.mural { position: absolute; left: 8%; top: 20%; font: 700 clamp(2rem, 6vw, 7rem) var(--mono); color: var(--bubblegum); opacity: .82; }
.mural.lower { top: 58%; color: var(--cyan); font-size: clamp(1.2rem, 3vw, 3.6rem); }
.ticket-machine { position: absolute; right: 9vw; top: 20vh; width: min(430px, 82vw); padding: 1.3rem; z-index: 4; background: linear-gradient(135deg, var(--melon), var(--lemon)); }
.ticket-machine button { border: 0; padding: 1rem; width: 100%; background: var(--asphalt); color: var(--mint); font: 700 .9rem var(--mono); box-shadow: 0 0 18px rgba(107,255,184,.45); cursor: pointer; }
.memory-ticket { position: absolute; left: 9vw; bottom: 16vh; padding: 1rem 1.3rem; background: white; color: var(--asphalt); font: 700 1rem var(--mono); transform: translateX(-140%); transition: transform .7s ease; box-shadow: 12px 12px 0 var(--cyan); z-index: 5; }
.memory-ticket.is-printed { transform: translateX(0) rotate(-2deg); }

.panorama { background: radial-gradient(circle at 50% 18%, rgba(255,243,56,.25), transparent 22%), linear-gradient(180deg, #111827, #060812); }
.skyline-final { position: absolute; left: 0; right: 0; bottom: 0; height: 58vh; display: flex; align-items: end; gap: 2vw; padding: 0 4vw; }
.skyline-final span { flex: 1; background: linear-gradient(180deg, #263457, #111827); border-top: 5px solid var(--cyan); box-shadow: inset 0 0 0 2px rgba(255,255,255,.05), 0 0 28px rgba(0,215,255,.22); }
.skyline-final span:nth-child(1) { height: 62%; }
.skyline-final span:nth-child(2) { height: 88%; }
.skyline-final span:nth-child(3) { height: 70%; background-image: linear-gradient(180deg, #34285b, #111827); }
.skyline-final span:nth-child(4) { height: 96%; }
.skyline-final span:nth-child(5) { height: 58%; }
.final-slate { position: absolute; left: 50%; top: 16vh; width: min(650px, 86vw); padding: 1.6rem; transform: translateX(-50%) rotate(1deg); text-align: center; }

@keyframes skyPulse { from { opacity: .7; transform: scale(1); } to { opacity: 1; transform: scale(1.08); } }
@keyframes blinkSignal { 0%, 45% { opacity: 1; } 46%, 100% { opacity: .28; } }
@keyframes droneFloat { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-18px); } }
@keyframes platformBlink { from { opacity: .45; transform: scaleX(.65); } to { opacity: 1; transform: scaleX(1); } }

@media (max-width: 760px) {
  .building-left, .building-right { width: 34vw; opacity: .72; }
  .building-center { left: 12vw; width: 76vw; }
  .hero-caption, .ticket-link, .route-board, .poster-stack, .ticket-machine, .market-card { left: 6vw; right: 6vw; width: auto; }
  .ticket-link { bottom: 3vh; text-align: center; }
  .citation-tower { right: 4vw; width: 45vw; opacity: .75; }
  .market-stalls { transform: scale(.72); transform-origin: left bottom; }
  .flip-billboard { left: 7vw; right: 7vw; top: 27vh; width: auto; }
  .station-clock { transform: scale(.7); transform-origin: left top; }
  .crosswalk { grid-template-columns: repeat(2, 1fr); }
}