:root {
  /* Roboto Slab** Slabb 700/900; IBM Plex Sans** Sanss 400/500 for prose */
  --moonwater: #BEE7FF;
  --navy: #11233F;
  --marble: #F6FAFF;
  --silver: #8DA3B8;
  --jasmine: #FFF2C2;
  --coral: #FF6B6B;
  --ink: #07111F;
  --scroll: 0;
  --scene: 0;
}

* { box-sizing: border-box; }

html {
  min-height: 100%;
  background: var(--ink);
  color: var(--navy);
  font-family: "IBM Plex Sans", Inter, Roboto, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  margin: 0;
  min-height: 100%;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 18%, #F6FAFF 0%, #DDF2FF 34%, #11233F 100%);
}

.marble-field,
.mist-layer {
  position: fixed;
  inset: -12vh -12vw;
  pointer-events: none;
  z-index: 0;
}

.marble-field {
  background:
    linear-gradient(112deg, transparent 0 18%, rgba(141, 163, 184, .34) 19%, transparent 21% 47%, rgba(190, 231, 255, .42) 49%, transparent 52%),
    linear-gradient(32deg, transparent 0 37%, rgba(141, 163, 184, .22) 38%, transparent 40% 64%, rgba(255, 242, 194, .20) 65%, transparent 66%),
    radial-gradient(circle at 22% 12%, rgba(255, 255, 255, .86), transparent 30%),
    radial-gradient(circle at 80% 72%, rgba(190, 231, 255, .52), transparent 38%),
    var(--marble);
  filter: saturate(112%) contrast(102%);
  transform: translate3d(0, calc(var(--scroll) * -18vh), 0) scale(1.08);
}

.marble-field::before,
.marble-field::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(124deg, transparent 0 90px, rgba(141, 163, 184, .22) 92px, transparent 96px),
    repeating-linear-gradient(72deg, transparent 0 160px, rgba(17, 35, 63, .08) 162px, transparent 166px);
  mix-blend-mode: multiply;
  opacity: .65;
  animation: veinDrift 18s ease-in-out infinite alternate;
}

.marble-field::after {
  opacity: .36;
  filter: blur(8px);
  transform: rotate(4deg) scale(1.1);
  animation-duration: 26s;
}

.mist-layer {
  z-index: 1;
  background:
    radial-gradient(ellipse at 16% 42%, rgba(190, 231, 255, .52), transparent 34%),
    radial-gradient(ellipse at 86% 20%, rgba(246, 250, 255, .78), transparent 30%),
    radial-gradient(ellipse at 58% 82%, rgba(255, 242, 194, .22), transparent 26%);
  filter: blur(20px);
  opacity: .72;
  transform: translateY(calc(var(--scroll) * 12vh));
}

.fixed-dossier {
  position: fixed;
  top: 28px;
  left: 32px;
  right: 32px;
  z-index: 10;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 18px;
  color: var(--navy);
  letter-spacing: .04em;
  text-transform: uppercase;
  font-size: 11px;
}

.dossier-mark {
  font-family: "Roboto Slab", Georgia, serif;
  font-weight: 900;
  font-size: 15px;
  text-transform: none;
}

.dossier-line { height: 1px; background: linear-gradient(90deg, var(--silver), transparent); }
.dossier-note { color: rgba(17, 35, 63, .66); }

.edge-note {
  position: fixed;
  z-index: 12;
  width: 164px;
  padding: 18px 16px;
  border: 1px solid rgba(141, 163, 184, .38);
  background: rgba(246, 250, 255, .44);
  backdrop-filter: blur(18px);
  box-shadow: 0 22px 60px rgba(7, 17, 31, .14);
  color: var(--navy);
}

.edge-note-left { left: 34px; bottom: 34px; transform: translateY(calc(var(--scroll) * -28px)); }
.edge-note-right { right: 34px; bottom: 34px; text-align: right; transform: translateY(calc(var(--scroll) * 24px)); }
.edge-note span { display: block; font-size: 10px; letter-spacing: .18em; text-transform: uppercase; color: var(--silver); }
.edge-note p { margin: 8px 0 0; font-family: "Noto Serif JP", Georgia, serif; font-size: 18px; line-height: 1.35; }
.edge-note b { display: block; margin-top: 8px; font-family: "Roboto Slab", Georgia, serif; font-size: 38px; line-height: .9; }
.note-kana { font-family: "Noto Serif JP", Georgia, serif; }
.note-shift { animation: refinedShake .36s ease-in-out both; }

main { position: relative; z-index: 3; }

.chamber {
  position: relative;
  min-height: 100vh;
  display: grid;
  align-items: center;
  padding: 120px 10vw;
}

.chamber::before {
  content: "";
  position: absolute;
  inset: 10vh 8vw;
  border: 1px solid rgba(141, 163, 184, .28);
  background: linear-gradient(135deg, rgba(246, 250, 255, .52), rgba(190, 231, 255, .15));
  clip-path: polygon(8% 0, 100% 7%, 92% 88%, 0 100%);
  box-shadow: inset 0 1px rgba(255,255,255,.9), 0 48px 120px rgba(17, 35, 63, .13);
  backdrop-filter: blur(8px);
  transform: translate3d(calc((var(--scene) - 1.5) * 6px), calc(var(--scroll) * -34px), 0) rotate(calc((var(--scene) - 1.5) * .45deg));
  z-index: -1;
}

.chamber-copy {
  max-width: 610px;
  padding: 38px;
  border-left: 1px solid rgba(141, 163, 184, .52);
  background: linear-gradient(110deg, rgba(246,250,255,.62), rgba(246,250,255,.18));
  backdrop-filter: blur(14px);
}

.offset-copy { margin-left: auto; margin-right: 4vw; }
.narrow-copy { max-width: 500px; margin-left: 8vw; }
.final-copy { margin: 0 auto; text-align: center; border-left: 0; border-top: 1px solid rgba(141, 163, 184, .5); }

.eyebrow {
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--silver);
  font-weight: 500;
}

.eyebrow.coral { color: var(--coral); }

h1, h2 {
  margin: 0;
  font-family: "Roboto Slab", Georgia, serif;
  font-weight: 900;
  color: var(--navy);
  letter-spacing: -.045em;
  text-shadow: 0 1px 0 rgba(255,255,255,.95), 0 18px 44px rgba(17,35,63,.15);
}

h1 { font-size: clamp(56px, 10vw, 150px); line-height: .86; }
h2 { font-size: clamp(38px, 6vw, 86px); line-height: .95; }

.lead, .chamber-copy p:not(.eyebrow), .route-labels {
  font-size: clamp(17px, 1.5vw, 22px);
  line-height: 1.65;
  color: rgba(17, 35, 63, .76);
}

.whisper, .final-note {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(255, 242, 194, .58);
  color: var(--navy);
  font-family: "Noto Serif JP", Georgia, serif;
  box-shadow: 0 0 36px rgba(255, 242, 194, .5);
}

.route-labels { list-style: none; padding: 0; margin: 22px 0 0; font-size: 15px; }
.route-labels li { margin: 10px 0; padding-left: 32px; position: relative; }
.route-labels li::before { content: "◇"; position: absolute; left: 0; color: var(--silver); }

.briefing-table {
  position: absolute;
  left: 9vw;
  bottom: 12vh;
  width: 42vw;
  height: 18vw;
  border: 1px solid rgba(141, 163, 184, .36);
  background: linear-gradient(135deg, rgba(246,250,255,.36), rgba(190,231,255,.24));
  transform: perspective(900px) rotateX(62deg) rotateZ(-12deg) translateY(calc(var(--scroll) * -80px));
  box-shadow: 0 48px 90px rgba(7, 17, 31, .18);
}

.briefing-table span { position: absolute; width: 36%; height: 1px; background: var(--silver); transform-origin: left; }
.briefing-table span:nth-child(1) { left: 16%; top: 24%; transform: rotate(21deg); }
.briefing-table span:nth-child(2) { left: 42%; top: 44%; transform: rotate(-28deg); }
.briefing-table span:nth-child(3) { left: 22%; top: 70%; transform: rotate(9deg); background: var(--jasmine); }

.fault-slab {
  position: absolute;
  right: 8vw;
  top: 22vh;
  width: min(430px, 34vw);
  height: 55vh;
  background: linear-gradient(96deg, rgba(17,35,63,.82) 0 48%, rgba(255,107,107,.75) 49%, rgba(246,250,255,.54) 50% 100%);
  clip-path: polygon(20% 0, 92% 8%, 78% 100%, 0 86%);
  opacity: calc(.25 + var(--scene) * .12);
  animation: seamShift 5s steps(2, end) infinite;
}

.tremor-button {
  margin-top: 18px;
  border: 1px solid rgba(255, 107, 107, .52);
  background: rgba(255, 107, 107, .08);
  color: var(--navy);
  padding: 13px 18px;
  border-radius: 0;
  font: 500 13px/1 "IBM Plex Sans", Inter, Roboto, sans-serif;
  letter-spacing: .12em;
  text-transform: uppercase;
  cursor: pointer;
}

.tremor-button.shake { animation: refinedShake .42s ease-in-out both; }

.artifact-stage {
  position: fixed;
  inset: 0;
  z-index: 5;
  pointer-events: none;
  display: grid;
  place-items: center;
  perspective: 1200px;
}

.route-svg {
  width: min(78vw, 760px);
  height: min(78vw, 760px);
  overflow: visible;
  opacity: calc(.42 + var(--scroll) * .46);
  transform: translate3d(calc((var(--scroll) - .5) * 10vw), calc((var(--scroll) - .5) * -6vh), 0) rotateX(calc(58deg - var(--scroll) * 38deg)) rotateZ(calc(-20deg + var(--scroll) * 58deg));
  filter: drop-shadow(0 34px 60px rgba(7,17,31,.18));
}

.briefing-seal, .route {
  fill: none;
  stroke: var(--silver);
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}

.briefing-seal { stroke-dasharray: 10 14; opacity: .72; }
.briefing-seal.inner { stroke: var(--moonwater); stroke-width: 4; filter: url(#softGlow); }
.route { stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 900; stroke-dashoffset: calc(900 - var(--scroll) * 900); }
.route-main { stroke: var(--navy); stroke-width: 3; }
.route-branch { stroke: var(--moonwater); stroke-width: 3; }
.route-fault { stroke: var(--coral); stroke-width: 4; opacity: calc(var(--scroll) * .9); animation: refinedShake 3.5s infinite; }
.node { fill: var(--marble); stroke: var(--navy); stroke-width: 3; }
.node.uncertain { fill: var(--coral); filter: url(#softGlow); animation: refinedShake 2.8s infinite; }

.jasmine-waypoint {
  position: absolute;
  width: calc(54px + var(--scroll) * 210px);
  height: calc(54px + var(--scroll) * 210px);
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) rotate(calc(var(--scroll) * 144deg));
  filter: drop-shadow(0 0 32px rgba(255, 242, 194, .9));
}

.jasmine-waypoint span {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 34%;
  height: 48%;
  transform-origin: 50% 100%;
  border-radius: 70% 70% 45% 45%;
  background: radial-gradient(circle at 50% 20%, #F6FAFF, var(--jasmine) 64%, rgba(255,242,194,.24));
  opacity: calc(.66 + var(--scroll) * .32);
}

.jasmine-waypoint span:nth-child(1) { transform: translate(-50%, -100%) rotate(0deg); }
.jasmine-waypoint span:nth-child(2) { transform: translate(-50%, -100%) rotate(72deg); }
.jasmine-waypoint span:nth-child(3) { transform: translate(-50%, -100%) rotate(144deg); }
.jasmine-waypoint span:nth-child(4) { transform: translate(-50%, -100%) rotate(216deg); }
.jasmine-waypoint span:nth-child(5) { transform: translate(-50%, -100%) rotate(288deg); }
.jasmine-waypoint i { position: absolute; inset: 42%; border-radius: 50%; background: var(--navy); box-shadow: 0 0 0 8px rgba(190,231,255,.42); }

.crystal {
  position: absolute;
  width: 18px;
  height: 18px;
  border: 1px solid rgba(17,35,63,.28);
  background: rgba(246,250,255,.5);
  transform: rotate(45deg);
  box-shadow: 0 0 26px rgba(190,231,255,.8);
}
.c1 { left: 24vw; top: 32vh; animation: driftOne 9s ease-in-out infinite; }
.c2 { right: 18vw; top: 24vh; animation: driftOne 11s ease-in-out infinite reverse; }
.c3 { right: 28vw; bottom: 18vh; animation: driftOne 13s ease-in-out infinite; }

@keyframes veinDrift { from { transform: translate(-2%, -1%); } to { transform: translate(2%, 1%); } }
@keyframes driftOne { 50% { transform: translateY(-28px) rotate(45deg) scale(1.25); } }
@keyframes seamShift { 50% { transform: translateX(2px) skewX(-1deg); } }
@keyframes refinedShake {
  0%, 100% { transform: translate(0, 0); }
  20% { transform: translate(2px, -1px); }
  40% { transform: translate(-1px, 1px); }
  60% { transform: translate(1px, 0); }
  80% { transform: translate(-2px, -1px); }
}

@media (max-width: 760px) {
  .fixed-dossier { left: 18px; right: 18px; grid-template-columns: auto 1fr; }
  .dossier-note { display: none; }
  .edge-note { display: none; }
  .chamber { padding: 100px 22px; }
  .chamber::before { inset: 9vh 16px; }
  .chamber-copy { padding: 26px; }
  .offset-copy, .narrow-copy { margin: 0; }
  .artifact-stage { opacity: .82; }
  .briefing-table, .fault-slab { display: none; }
}