:root {
  /* Typography compliance tokens: IBM Plex Mono only for hashes; IBM Plex Sans* Sans** for compact explanations; Space Grotesk* Grotesk** for section names. */
  --harbor: #05070A;
  --graphite: #111820;
  --mist: #DDE7E8;
  --fjord: #18FFB2;
  --magenta: #FF2E88;
  --cyan: #55D7FF;
  --amber: #FFB000;
  --water: #071B2F;
  --display: "Bebas Neue", Impact, sans-serif;
  --ui: "Space Grotesk", system-ui, sans-serif;
  --body: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", monospace;
}

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

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 72% 18%, rgba(85, 215, 255, .12), transparent 24rem),
    radial-gradient(circle at 82% 72%, rgba(24, 255, 178, .09), transparent 22rem),
    linear-gradient(90deg, rgba(5, 7, 10, .2), rgba(7, 27, 47, .18));
  z-index: 0;
}

.ambient-grid {
  position: fixed;
  inset: 0;
  opacity: .16;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(221, 231, 232, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(221, 231, 232, .08) 1px, transparent 1px);
  background-size: 78px 78px;
  mask-image: linear-gradient(90deg, transparent, #000 25%, #000 75%, transparent);
  z-index: 1;
}

.watch-hud {
  position: fixed;
  top: 18px;
  left: 22px;
  right: 22px;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: rgba(221, 231, 232, .64);
  mix-blend-mode: screen;
}

.seam {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  z-index: 18;
  background: linear-gradient(180deg, transparent, var(--cyan), var(--fjord), transparent);
  box-shadow: 0 0 22px rgba(85, 215, 255, .55), 0 0 48px rgba(24, 255, 178, .22);
  transform: translateX(-50%);
}
.seam span {
  position: absolute;
  left: -8px;
  right: -8px;
  top: -22%;
  height: 18%;
  background: linear-gradient(180deg, transparent, rgba(24,255,178,.05), rgba(24,255,178,.85), transparent);
  animation: seamSweep 5.8s ease-in-out infinite;
}
.seam.hot { box-shadow: 0 0 32px var(--magenta), 0 0 80px rgba(255,46,136,.45); background: var(--magenta); }

main { position: relative; z-index: 2; }
.act {
  min-height: 100vh;
  position: relative;
  display: grid;
  overflow: hidden;
  border-bottom: 1px solid rgba(221, 231, 232, .08);
}
.pane { min-height: 100vh; position: relative; }
.act-harbor { grid-template-columns: 1fr 1fr; }
.evidence-pane {
  padding: 12vh 6vw 8vh 7vw;
  background: linear-gradient(135deg, var(--harbor), var(--graphite));
  border-right: 1px solid rgba(221, 231, 232, .12);
}
.eyebrow {
  margin: 0 0 26px;
  font-family: var(--ui);
  text-transform: uppercase;
  color: var(--cyan);
  letter-spacing: .16em;
  font-size: 12px;
}
h1, h2, .split-title {
  font-family: var(--display);
  font-weight: 400;
  letter-spacing: -.025em;
  text-transform: uppercase;
}
h1 {
  margin: 0;
  font-size: clamp(88px, 17vw, 260px);
  line-height: .78;
  transform: translateX(-1.5vw);
  animation: titleReveal 1.4s cubic-bezier(.2,.8,.1,1) both;
}
h1 span { display: block; white-space: nowrap; }
.note {
  max-width: 430px;
  margin: 32px 0;
  color: rgba(221, 231, 232, .72);
  font-size: 18px;
  line-height: 1.45;
}
.command {
  appearance: none;
  border: 1px solid var(--fjord);
  background: rgba(24, 255, 178, .08);
  color: var(--mist);
  font-family: var(--ui);
  text-transform: uppercase;
  letter-spacing: .12em;
  padding: 16px 22px;
  cursor: pointer;
  box-shadow: inset 0 0 22px rgba(24,255,178,.08), 0 0 24px rgba(24,255,178,.1);
}
.command:hover { background: var(--fjord); color: var(--harbor); }

.submerged-pane {
  background: radial-gradient(circle at 40% 35%, rgba(85,215,255,.13), transparent 28%), linear-gradient(160deg, var(--water), var(--harbor) 72%);
}
.circuit { position: absolute; inset: 6%; width: 88%; height: 88%; filter: drop-shadow(0 0 8px rgba(24,255,178,.35)); }
.route { fill: none; stroke-width: 3; stroke-linecap: square; stroke-linejoin: round; opacity: .65; stroke-dasharray: 12 12; }
.route.dormant { stroke: rgba(221,231,232,.22); }
.route.active { stroke: var(--fjord); animation: dash 11s linear infinite; }
.route.cyan { stroke: var(--cyan); animation: dash 14s linear infinite reverse; }
.nodes circle { fill: var(--harbor); stroke: var(--cyan); stroke-width: 3; }
.bubble-field, .bubble { position: absolute; inset: 0; }
.bubble {
  width: var(--size);
  height: var(--size);
  left: var(--x);
  top: 105%;
  border: 1px solid rgba(85, 215, 255, .88);
  border-radius: 50%;
  background: radial-gradient(circle at 34% 28%, rgba(221,231,232,.35), rgba(85,215,255,.08) 36%, rgba(24,255,178,.03));
  box-shadow: 0 0 18px rgba(85,215,255,.32), inset 0 0 18px rgba(24,255,178,.16);
  animation: bubbleRise var(--dur) linear infinite;
  animation-delay: var(--delay);
}
.bubble::after {
  content: attr(data-code);
  position: absolute;
  inset: 35% 12% auto;
  height: 1px;
  font-family: var(--mono);
  font-size: 7px;
  color: rgba(221,231,232,.54);
  border-top: 1px solid rgba(221,231,232,.5);
  overflow: hidden;
}
.container-slab, .drifter {
  position: absolute;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--mist);
  border: 1px solid rgba(85,215,255,.46);
  background: rgba(17,24,32,.72);
  padding: 12px 24px;
  border-radius: 14px;
}
.slab-a { right: 16%; top: 31%; animation: drift 13s ease-in-out infinite; }
.slab-b { right: 42%; bottom: 18%; animation: drift 15s ease-in-out infinite reverse; }
.scanner-line {
  position: absolute;
  top: 0; bottom: 0; left: -20%; width: 18%;
  background: linear-gradient(90deg, transparent, rgba(24,255,178,.18), transparent);
  animation: scanAcross 6s ease-in-out infinite;
}

.act-lading {
  grid-template-columns: 35% 65%;
  padding: 10vh 5vw;
  background: linear-gradient(90deg, var(--graphite) 0 35%, var(--harbor) 35%);
}
.split-title {
  position: absolute;
  left: -1vw;
  top: 12vh;
  color: rgba(221,231,232,.11);
  font-size: clamp(110px, 20vw, 310px);
  line-height: .78;
}
.split-title span { display: block; }
.lading-copy { align-self: end; max-width: 330px; padding-bottom: 8vh; }
.lading-copy p:last-child { color: rgba(221,231,232,.68); line-height: 1.5; }
.evidence-tags {
  grid-column: 2;
  display: grid;
  grid-template-columns: repeat(2, minmax(220px, 1fr));
  gap: 22px;
  align-content: center;
  perspective: 1200px;
}
.flip-card { min-height: 260px; cursor: pointer; perspective: 1200px; }
.flip-inner { position: relative; width: 100%; height: 100%; min-height: 260px; transition: transform .8s cubic-bezier(.2,.8,.2,1); transform-style: preserve-3d; }
.flip-card.flipped .flip-inner { transform: rotateY(180deg) translateZ(0); }
.card-face {
  position: absolute;
  inset: 0;
  padding: 24px;
  backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid rgba(221,231,232,.32);
}
.card-front { background: #DDE7E8; color: var(--harbor); }
.card-back {
  transform: rotateY(180deg);
  background: linear-gradient(135deg, var(--graphite), var(--harbor));
  color: var(--mist);
  border-color: var(--magenta);
  box-shadow: inset 0 0 32px rgba(255,46,136,.12), 0 0 28px rgba(255,46,136,.14);
}
.card-face span { font-family: var(--ui); text-transform: uppercase; letter-spacing: .18em; font-size: 12px; color: var(--magenta); }
.card-front span { color: var(--water); }
.card-face strong { font-family: var(--ui); font-size: 28px; line-height: 1; }
.card-face small { font-family: var(--mono); text-transform: uppercase; letter-spacing: .08em; opacity: .75; }

.act-route { grid-template-columns: 35% 65%; background: var(--harbor); }
.route-left { padding: 18vh 4vw 8vh 7vw; background: var(--graphite); }
.route-left h2, .fracture-left h2, .ledger-pane h2 { margin: 0; font-size: clamp(82px, 12vw, 180px); line-height: .78; }
.route-left p:last-child, .fracture-left p:last-child { color: rgba(221,231,232,.66); line-height: 1.5; max-width: 390px; }
.route-map { position: relative; overflow: hidden; background: linear-gradient(145deg, var(--water), var(--harbor)); }
.lane { position: absolute; height: 2px; background: linear-gradient(90deg, transparent, var(--fjord), transparent); box-shadow: 0 0 18px rgba(24,255,178,.6); transform-origin: left; }
.lane-one { width: 78%; left: 8%; top: 29%; transform: rotate(13deg); }
.lane-two { width: 85%; left: 5%; top: 56%; transform: rotate(-9deg); background: linear-gradient(90deg, transparent, var(--cyan), transparent); }
.lane-three { width: 62%; left: 20%; top: 76%; transform: rotate(5deg); }
.checkpoint { position: absolute; width: 92px; height: 92px; border: 1px solid var(--cyan); border-radius: 50%; display: grid; place-items: center; font-family: var(--mono); font-size: 10px; color: var(--mist); background: rgba(5,7,10,.6); box-shadow: 0 0 24px rgba(85,215,255,.18); }
.cp1 { left: 12%; top: 20%; } .cp2 { left: 42%; top: 34%; } .cp3 { right: 14%; top: 48%; } .cp4 { left: 26%; bottom: 12%; }
.drifter { animation: routeDrift 10s ease-in-out infinite; }
.d1 { left: 10%; top: 33%; } .d2 { left: 56%; top: 57%; animation-delay: -3s; } .d3 { left: 32%; bottom: 20%; animation-delay: -6s; }

.act-tamper { grid-template-columns: 52% 48%; background: var(--harbor); }
.act-tamper::before {
  content: ""; position: absolute; inset: -20% 44% -20% 39%;
  background: linear-gradient(135deg, transparent 40%, rgba(255,46,136,.65) 49%, rgba(255,46,136,.12) 51%, transparent 60%);
  transform: skewX(-13deg); animation: rupture 2.4s ease-in-out infinite;
}
.fracture-left { padding: 17vh 6vw; background: linear-gradient(160deg, var(--graphite), var(--harbor)); clip-path: polygon(0 0, 84% 0, 100% 100%, 0 100%); }
.alarm { color: var(--magenta); }
.fracture-right { position: relative; background: radial-gradient(circle at 50% 50%, rgba(255,46,136,.16), transparent 30%), var(--water); }
.warning-bloom { position: absolute; width: 420px; height: 420px; left: 50%; top: 48%; transform: translate(-50%,-50%); }
.warning-bloom span { position: absolute; border: 1px solid var(--magenta); border-radius: 50%; box-shadow: 0 0 22px rgba(255,46,136,.4), inset 0 0 22px rgba(85,215,255,.12); animation: bloom 3s ease-in-out infinite; }
.warning-bloom span:nth-child(1){ inset: 8% 37% 60% 33%; }
.warning-bloom span:nth-child(2){ inset: 36% 14% 35% 56%; animation-delay: -.4s; }
.warning-bloom span:nth-child(3){ inset: 59% 34% 9% 35%; animation-delay: -.8s; }
.warning-bloom span:nth-child(4){ inset: 35% 58% 34% 13%; animation-delay: -1.2s; }
.warning-bloom span:nth-child(5){ inset: 29% 31% 29% 31%; border-color: var(--amber); animation-delay: -1.6s; }
.warning-bloom span:nth-child(6){ inset: 45% 45% 45% 45%; background: var(--magenta); }
.warning-bloom b { position: absolute; inset: 0; display: grid; place-items: center; font-family: var(--display); font-size: 96px; color: rgba(221,231,232,.12); }
.stamp { position: absolute; right: 9%; bottom: 16%; border: 3px solid var(--magenta); color: var(--magenta); font-family: var(--ui); font-size: 34px; font-weight: 700; padding: 12px 18px; transform: rotate(-12deg); letter-spacing: .08em; animation: stampImpact 3s ease-in-out infinite; }

.act-watch { grid-template-rows: 44% 56%; background: var(--harbor); }
.ledger-pane { padding: 10vh 7vw 5vh; background: var(--graphite); border-bottom: 1px solid rgba(221,231,232,.14); }
.ledger-lines { position: absolute; right: 7vw; top: 10vh; min-width: 330px; font-family: var(--mono); text-transform: uppercase; }
.ledger-lines p { display: flex; justify-content: space-between; gap: 40px; border-bottom: 1px solid rgba(221,231,232,.18); padding: 14px 0; margin: 0; }
.ledger-lines b { color: var(--fjord); font-weight: 500; }
.sensor-pane { position: relative; display: grid; place-items: center; background: radial-gradient(circle at center, rgba(24,255,178,.12), transparent 28%), linear-gradient(180deg, var(--water), var(--harbor)); }
.sensor-ring { width: min(52vw, 520px); aspect-ratio: 1; border-radius: 50%; border: 1px solid var(--fjord); box-shadow: 0 0 38px rgba(24,255,178,.25), inset 0 0 60px rgba(85,215,255,.12); animation: sensorPulse 4s ease-in-out infinite; }
.sensor-ring::before, .sensor-ring::after { content: ""; position: absolute; inset: 50% 8%; height: 1px; background: var(--cyan); box-shadow: 0 0 18px var(--cyan); }
.sensor-ring::after { transform: rotate(90deg); }
.sensor-copy { position: absolute; font-family: var(--ui); text-transform: uppercase; text-align: center; letter-spacing: .16em; font-size: 13px; color: var(--mist); }
.sensor-copy span { color: var(--fjord); font-family: var(--mono); font-size: 11px; }

@keyframes titleReveal { from { opacity: 0; clip-path: inset(0 100% 0 0); } to { opacity: 1; clip-path: inset(0); } }
@keyframes seamSweep { 0%,100% { transform: translateY(0); } 50% { transform: translateY(720%); } }
@keyframes dash { to { stroke-dashoffset: -240; } }
@keyframes bubbleRise { to { transform: translate3d(var(--sway), -128vh, 0) scale(var(--scale)); } }
@keyframes scanAcross { 0%, 25% { transform: translateX(0); opacity: 0; } 40%, 70% { opacity: 1; } 100% { transform: translateX(760%); opacity: 0; } }
@keyframes drift { 0%,100% { transform: translate(0,0); } 50% { transform: translate(-24px, 18px); } }
@keyframes routeDrift { 0%,100% { transform: translateX(0); } 50% { transform: translateX(90px); } }
@keyframes rupture { 0%,100% { opacity: .35; } 50% { opacity: 1; } }
@keyframes bloom { 0%,100% { transform: scale(.92); opacity: .62; } 50% { transform: scale(1.08); opacity: 1; } }
@keyframes stampImpact { 0%,70%,100% { transform: rotate(-12deg) scale(1); } 75% { transform: rotate(-12deg) scale(1.18); } 82% { transform: rotate(-12deg) scale(.98); } }
@keyframes sensorPulse { 0%,100% { transform: scale(.96); opacity: .7; } 50% { transform: scale(1.02); opacity: 1; } }

@media (max-width: 860px) {
  .seam { left: auto; top: 50%; right: 0; width: auto; height: 2px; transform: translateY(-50%); }
  .act-harbor, .act-lading, .act-route, .act-tamper { grid-template-columns: 1fr; }
  .pane { min-height: 50vh; }
  .evidence-pane, .route-left, .fracture-left, .ledger-pane { padding: 9vh 7vw; }
  .evidence-tags { grid-column: 1; grid-template-columns: 1fr; }
  .act-lading { background: var(--harbor); }
  .split-title { position: relative; top: auto; left: auto; font-size: 22vw; }
  .lading-copy { padding-bottom: 2vh; }
  .route-map, .fracture-right { min-height: 58vh; }
  .fracture-left { clip-path: none; }
  .ledger-lines { position: relative; top: auto; right: auto; margin-top: 24px; }
  .watch-hud { display: none; }
}