:root {
  --solar: #FF6A2A;
  --coral: #FF3D5A;
  --amber: #FFC857;
  --violet: #241B2F;
  --cream: #F4E2C1;
  --teal: #18F2B2;
  --brick: #9A3B22;
  --display: 'Bebas Neue', Impact, Haettenschweiler, sans-serif;
  --mono: 'IBM Plex Mono', 'Courier New', monospace;
  --body: 'Space Grotesk', Inter, system-ui, sans-serif;
  --spray: 'Rubik Spray Paint', fantasy;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--violet);
  color: var(--cream);
  font-family: var(--body);
  cursor: grab;
}

body.dragging { cursor: grabbing; }

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 80;
  opacity: .25;
  background-image:
    radial-gradient(circle at 12% 18%, rgba(244,226,193,.28) 0 1px, transparent 1.8px),
    radial-gradient(circle at 72% 42%, rgba(255,106,42,.22) 0 1px, transparent 2px),
    radial-gradient(circle at 38% 78%, rgba(24,242,178,.16) 0 1px, transparent 2px);
  background-size: 34px 34px, 47px 47px, 59px 59px;
  mix-blend-mode: overlay;
}

.sun-flare {
  position: fixed;
  left: -18vw;
  top: -18vh;
  width: 70vw;
  height: 70vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,200,87,.85), rgba(255,106,42,.55) 34%, rgba(255,61,90,.22) 54%, transparent 72%);
  filter: blur(12px);
  z-index: 1;
  pointer-events: none;
}

.hud-top {
  position: fixed;
  top: 18px;
  left: 22px;
  right: 22px;
  z-index: 90;
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--teal);
  text-shadow: 0 0 14px rgba(24,242,178,.55);
}

.progress {
  position: fixed;
  left: 22px;
  right: 22px;
  top: 44px;
  height: 3px;
  z-index: 90;
  background: rgba(244,226,193,.15);
}

#progressBar {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--amber), var(--solar), var(--coral), var(--teal));
  box-shadow: 0 0 18px rgba(24,242,178,.55);
}

.viewport {
  position: fixed;
  inset: 0;
  overflow: hidden;
  z-index: 5;
}

.mural-rail {
  height: 100vh;
  display: flex;
  will-change: transform;
  transform: translate3d(0,0,0);
}

.panel {
  position: relative;
  width: 100vw;
  height: 100vh;
  flex: 0 0 100vw;
  overflow: hidden;
  padding: 8vh 7vw;
  background:
    linear-gradient(90deg, rgba(36,27,47,.98), rgba(36,27,47,.8)),
    radial-gradient(circle at 70% 30%, rgba(255,106,42,.35), transparent 35%);
  border-right: 2px solid rgba(244,226,193,.18);
}

.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, transparent 0 18%, rgba(255,106,42,.18) 18% 24%, transparent 24% 100%),
    repeating-linear-gradient(0deg, rgba(244,226,193,.04) 0 1px, transparent 1px 74px);
  mix-blend-mode: screen;
  pointer-events: none;
}

.panel.active .draw-line { stroke-dashoffset: 0; }
.panel.active .tutorial-card, .panel.active .open-question { transform: translateY(0) rotate(-1deg); opacity: 1; }
.panel.active .marker { transform: scale(1) rotate(45deg); }
.panel.zooming .marker { transform: scale(7) rotate(45deg); opacity: .18; }

.wall-seam {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(90deg, transparent 0 15vw, rgba(154,59,34,.38) 15vw calc(15vw + 4px));
  opacity: .45;
}

.tag-layer {
  position: absolute;
  left: -2vw;
  bottom: 12vh;
  font-family: var(--spray);
  font-size: 10vw;
  color: rgba(154,59,34,.32);
  transform: rotate(-6deg);
  white-space: nowrap;
}

.site-title {
  position: absolute;
  left: 6vw;
  top: 18vh;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(90px, 18vw, 255px);
  line-height: .78;
  letter-spacing: .01em;
  text-transform: uppercase;
  color: var(--cream);
  text-shadow: 9px 10px 0 var(--brick), 0 0 45px rgba(255,106,42,.45);
}

.site-title span { color: var(--coral); }

.lesson-label, .mono {
  font-family: var(--mono);
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.lesson-label {
  position: absolute;
  top: 16vh;
  left: 8vw;
  z-index: 3;
  font-size: 12px;
  padding: 9px 12px;
  border: 1px solid var(--teal);
  background: rgba(36,27,47,.76);
  box-shadow: 0 0 18px rgba(24,242,178,.36);
}

.label-two { top: 64vh; left: 58vw; color: var(--amber); border-color: var(--amber); }
.label-three { top: 73vh; left: 19vw; color: var(--coral); border-color: var(--coral); }

.flicker { animation: flicker 3.6s infinite steps(1); }

.scene-copy {
  position: absolute;
  left: 9vw;
  bottom: 15vh;
  width: 420px;
  max-width: 46vw;
  font-size: clamp(17px, 1.7vw, 25px);
  line-height: 1.35;
  color: var(--cream);
}

.big-word {
  position: absolute;
  font-family: var(--display);
  font-size: clamp(150px, 26vw, 390px);
  line-height: .76;
  letter-spacing: .015em;
  color: rgba(244,226,193,.14);
  text-transform: uppercase;
  white-space: nowrap;
  pointer-events: none;
}

.crop-left { left: -5vw; top: 5vh; color: rgba(255,200,87,.22); }
.crop-right { right: -7vw; top: 6vh; color: rgba(255,61,90,.21); }
.outline { left: 6vw; top: 8vh; color: transparent; -webkit-text-stroke: 3px var(--coral); opacity: .72; }
.tunnel-word { left: 18vw; top: 4vh; color: rgba(255,106,42,.18); }
.map-word { left: -3vw; top: 7vh; color: transparent; -webkit-text-stroke: 3px var(--amber); }

.panel-number {
  position: absolute;
  right: 5vw;
  top: 10vh;
  font-family: var(--display);
  font-size: 7vw;
  color: var(--solar);
  opacity: .72;
}

.tutorial-card, .open-question {
  position: absolute;
  z-index: 4;
  width: min(430px, 38vw);
  padding: 24px;
  background: rgba(244,226,193,.92);
  color: var(--violet);
  border: 3px solid var(--violet);
  box-shadow: 12px 12px 0 var(--brick), 0 0 36px rgba(255,106,42,.24);
  transform: translateY(22px) rotate(-1deg);
  opacity: .65;
  transition: transform .7s ease, opacity .7s ease;
}

.tutorial-card h2, .open-question h2 {
  margin: 10px 0 12px;
  font-family: var(--display);
  font-size: clamp(44px, 5vw, 74px);
  line-height: .85;
  text-transform: uppercase;
}

.tutorial-card p, .open-question p {
  margin: 0;
  font-size: 18px;
  line-height: 1.35;
}

.panel-dilemma .tutorial-card { left: 10vw; bottom: 12vh; }
.panel-conflict .tutorial-card { right: 8vw; bottom: 13vh; }
.tutorial-card.dark { background: rgba(36,27,47,.9); color: var(--cream); border-color: var(--teal); box-shadow: 12px 12px 0 var(--coral); }
.tunnel-card { left: 8vw; top: 18vh; }
.tutorial-card.cream { left: 12vw; bottom: 14vh; }

.marker {
  position: absolute;
  z-index: 12;
  width: 58px;
  height: 58px;
  border: 3px solid var(--teal);
  background: rgba(255,106,42,.18);
  transform: scale(.86) rotate(45deg);
  transition: transform .65s cubic-bezier(.2,.8,.1,1), opacity .35s ease;
  box-shadow: 0 0 0 12px rgba(255,106,42,.17), 0 0 30px rgba(24,242,178,.55);
}

.marker span, .repaired-marker span, .unresolved-marker span {
  position: absolute;
  inset: 13px;
  border: 3px solid var(--amber);
  border-radius: 50%;
}

.marker-one { right: 18vw; top: 36vh; }
.marker-two { right: 22vw; bottom: 24vh; }
.marker-three { left: 43vw; top: 42vh; }
.marker-four { right: 13vw; top: 22vh; }
.marker-five { right: 25vw; bottom: 27vh; }

.overlay-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
}

.draw-line {
  fill: none;
  stroke-width: 5;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
  transition: stroke-dashoffset 1.4s ease .15s;
  filter: drop-shadow(0 0 10px currentColor);
}

.wide { stroke-width: 11; }
.amber { stroke: var(--amber); color: var(--amber); }
.teal { stroke: var(--teal); color: var(--teal); }
.coral { stroke: var(--coral); color: var(--coral); }
.geo-outline, .arrow-poly { fill: rgba(255,106,42,.17); stroke: var(--teal); stroke-width: 4; }

.spray-can {
  position: absolute;
  right: 16vw;
  top: 20vh;
  width: 90px;
  height: 240px;
  background: linear-gradient(90deg, var(--brick), var(--solar), var(--amber));
  border: 4px solid var(--violet);
  transform: rotate(18deg);
  box-shadow: 14px 14px 0 rgba(36,27,47,.55);
}

.spray-can::before { content: ""; position: absolute; left: 18px; top: -35px; width: 54px; height: 35px; background: var(--cream); border: 4px solid var(--violet); }
.spray-can::after { content: ""; position: absolute; right: -220px; top: 40px; width: 220px; height: 120px; background: radial-gradient(circle, rgba(24,242,178,.5) 0 2px, transparent 4px); background-size: 20px 20px; }

.polygon-person {
  position: absolute;
  width: 110px;
  height: 230px;
  clip-path: polygon(50% 0, 78% 20%, 65% 50%, 90% 100%, 50% 82%, 12% 100%, 34% 50%, 22% 20%);
  background: linear-gradient(150deg, var(--teal), rgba(24,242,178,.12));
  opacity: .85;
  filter: drop-shadow(0 0 18px rgba(24,242,178,.4));
}
.person-a { left: 50vw; bottom: 10vh; }
.person-b { left: 62vw; bottom: 14vh; transform: scale(.78); background: linear-gradient(150deg, var(--coral), rgba(255,61,90,.1)); }
.person-c { left: 73vw; bottom: 8vh; transform: scale(1.08); background: linear-gradient(150deg, var(--amber), rgba(255,200,87,.1)); }

.panel-conflict { background: radial-gradient(circle at 44% 48%, rgba(255,61,90,.36), transparent 22%), linear-gradient(90deg, #241B2F, #3b2032); }
.focus-ring {
  position: absolute;
  left: 28vw;
  top: 16vh;
  width: 42vw;
  height: 42vw;
  border-radius: 50%;
  border: 4px dashed var(--solar);
  box-shadow: inset 0 0 55px rgba(255,106,42,.22), 0 0 42px rgba(255,61,90,.34);
  animation: slowspin 20s linear infinite;
}
.fracture-circle {
  position: absolute;
  left: 38vw;
  top: 31vh;
  width: 18vw;
  height: 18vw;
  border-radius: 50%;
  background: radial-gradient(circle, var(--amber), var(--solar) 48%, transparent 49%);
  filter: drop-shadow(0 0 35px rgba(255,106,42,.5));
}
.fracture-circle i { position: absolute; width: 4px; height: 115%; background: var(--violet); left: 50%; top: -8%; transform-origin: center; }
.fracture-circle i:nth-child(2) { transform: rotate(42deg); }
.fracture-circle i:nth-child(3) { transform: rotate(93deg); }
.fracture-circle i:nth-child(4) { transform: rotate(138deg); }

.scanner {
  position: absolute;
  padding: 12px 16px;
  border: 2px solid var(--teal);
  font-family: var(--mono);
  text-transform: uppercase;
  color: var(--teal);
  background: rgba(36,27,47,.72);
}
.scanner::before, .scanner::after { content: ""; position: absolute; width: 18px; height: 18px; border-color: var(--teal); border-style: solid; }
.scanner::before { left: -8px; top: -8px; border-width: 3px 0 0 3px; }
.scanner::after { right: -8px; bottom: -8px; border-width: 0 3px 3px 0; }
.scanner-a { left: 19vw; bottom: 24vh; }
.scanner-b { right: 20vw; top: 24vh; }

.panel-tunnel { background: linear-gradient(100deg, #241B2F, #3b1f2b 56%, #9A3B22); }
.crosswalk {
  position: absolute;
  left: -4vw;
  bottom: 4vh;
  width: 112vw;
  height: 31vh;
  transform: perspective(440px) rotateX(60deg);
  transform-origin: bottom;
  background: repeating-linear-gradient(90deg, rgba(244,226,193,.9) 0 6vw, transparent 6vw 10vw);
  opacity: .38;
}
.caution {
  position: absolute;
  font-family: var(--mono);
  background: repeating-linear-gradient(45deg, var(--amber) 0 18px, var(--violet) 18px 36px);
  color: var(--violet);
  padding: 10px 70px;
  font-weight: 700;
  box-shadow: 0 0 24px rgba(255,200,87,.32);
}
.caution-one { right: 8vw; bottom: 18vh; transform: rotate(-11deg); }
.caution-two { left: 45vw; top: 23vh; transform: rotate(16deg); }
.path-node {
  position: absolute;
  z-index: 5;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  border: 3px solid var(--teal);
  color: var(--teal);
  font-family: var(--mono);
  background: var(--violet);
  box-shadow: 0 0 24px rgba(24,242,178,.42);
}
.node-a { left: 28vw; bottom: 28vh; }
.node-b { left: 52vw; bottom: 44vh; }
.node-c { right: 13vw; top: 19vh; }

.repaired-marker, .unresolved-marker {
  position: absolute;
  width: 210px;
  height: 210px;
  border: 5px solid var(--teal);
  transform: rotate(45deg);
  box-shadow: 0 0 60px rgba(24,242,178,.4), inset 0 0 30px rgba(255,200,87,.25);
}
.repaired-marker { right: 20vw; top: 34vh; }
.reflection-strip {
  position: absolute;
  left: 0;
  top: 49vh;
  width: 100%;
  display: flex;
  justify-content: space-around;
  font-family: var(--display);
  font-size: 6vw;
  color: rgba(244,226,193,.14);
  transform: rotate(-4deg);
}

.panel-map { background: radial-gradient(circle at 72% 24%, rgba(24,242,178,.28), transparent 28%), linear-gradient(115deg, #241B2F, #2c1e35 44%, #9A3B22); }
.map-grid {
  position: absolute;
  inset: 18vh 8vw 10vh 8vw;
  background-image: linear-gradient(rgba(24,242,178,.22) 1px, transparent 1px), linear-gradient(90deg, rgba(24,242,178,.22) 1px, transparent 1px);
  background-size: 52px 52px;
  transform: perspective(600px) rotateX(55deg);
  box-shadow: inset 0 0 80px rgba(24,242,178,.18);
}
.open-question { right: 10vw; bottom: 14vh; background: rgba(36,27,47,.92); color: var(--cream); border-color: var(--amber); box-shadow: 12px 12px 0 var(--solar); }
.unresolved-marker { left: 24vw; top: 38vh; border-color: var(--coral); }
.map-dot { fill: var(--amber); stroke: var(--violet); stroke-width: 4; filter: drop-shadow(0 0 10px var(--amber)); }

.sidewalk-grid {
  position: fixed;
  left: -5vw;
  right: -5vw;
  bottom: -4vh;
  height: 28vh;
  z-index: 60;
  pointer-events: none;
  background:
    linear-gradient(90deg, transparent 49.5%, rgba(244,226,193,.25) 50%, transparent 50.5%),
    repeating-linear-gradient(90deg, transparent 0 10vw, rgba(244,226,193,.22) 10vw calc(10vw + 2px)),
    linear-gradient(0deg, rgba(36,27,47,.72), transparent);
  transform: perspective(520px) rotateX(64deg);
  transform-origin: bottom;
}

.drag-hint {
  position: fixed;
  left: 50%;
  bottom: 25px;
  z-index: 92;
  transform: translateX(-50%);
  padding: 9px 16px;
  border: 1px solid rgba(244,226,193,.5);
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--cream);
  background: rgba(36,27,47,.72);
  transition: opacity .4s ease;
}
.drag-hint.hide { opacity: 0; }

@keyframes flicker {
  0%, 84%, 100% { opacity: 1; transform: translate(0,0); }
  85% { opacity: .25; transform: translate(2px,-1px); }
  86% { opacity: .9; }
  88% { opacity: .38; transform: translate(-1px,1px); }
}

@keyframes slowspin { to { transform: rotate(360deg); } }

@media (max-width: 760px) {
  .tutorial-card, .open-question { width: 72vw; padding: 18px; }
  .tutorial-card p, .open-question p { font-size: 15px; }
  .scene-copy { max-width: 72vw; width: 72vw; }
  .hud-top { font-size: 10px; }
  .lesson-label { font-size: 10px; }
  .marker { width: 44px; height: 44px; }
}