:root {
  /* Typography compliance: IBM Plex Mono** from Google Fonts only for tiny checksum strings; Source Sans 3** from Google Fonts for quiet explanatory body copy. */
  --abyss: #061722;
  --black-blue: #0B2A3A;
  --pressure: #0F5E6E;
  --cyan: #63D7E8;
  --ivory: #E9E2CF;
  --brass: #B49A63;
  --red: #C44536;
  --white: #FFFFFF;
  --shadow: #001018;
  --serif: "Libre Baskerville", Baskerville, Georgia, serif;
  --sans: "Source Sans 3", Inter, system-ui, sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--shadow);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ivory);
  font-family: var(--sans);
  overflow-x: hidden;
  background:
    radial-gradient(circle at 74% 8%, rgba(99, 215, 232, 0.16), transparent 32rem),
    radial-gradient(circle at 14% 44%, rgba(15, 94, 110, 0.26), transparent 44rem),
    linear-gradient(145deg, var(--shadow), var(--abyss) 38%, var(--black-blue));
}

body::before {
  content: "";
  position: fixed;
  inset: -20%;
  pointer-events: none;
  z-index: 0;
  background-image:
    repeating-linear-gradient(116deg, transparent 0 44px, rgba(99, 215, 232, 0.035) 45px, transparent 47px),
    repeating-linear-gradient(8deg, transparent 0 82px, rgba(233, 226, 207, 0.025) 83px, transparent 85px);
  transform: translateY(calc(var(--scroll, 0) * -0.018px));
}

.ocean-noise {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.48;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, 0.23) 0 1px, transparent 1.4px),
    radial-gradient(circle, rgba(99, 215, 232, 0.17) 0 1px, transparent 1.6px),
    linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.035), transparent);
  background-size: 43px 43px, 71px 71px, 100% 100%;
  mix-blend-mode: screen;
  transform: translate3d(0, calc(var(--scroll, 0) * -0.035px), 0);
}

.sonar-field {
  position: fixed;
  inset: -15% -20%;
  z-index: 2;
  pointer-events: none;
  transform: translateY(calc(var(--scroll, 0) * -0.08px));
}

.sonar-field span {
  position: absolute;
  width: 120vw;
  height: 18vh;
  left: -10vw;
  transform: rotate(-13deg);
  background: linear-gradient(90deg, transparent, rgba(99, 215, 232, 0.08), rgba(233, 226, 207, 0.025), transparent);
  filter: blur(1px);
}

.sonar-field span:nth-child(1) { top: 11%; }
.sonar-field span:nth-child(2) { top: 35%; transform: rotate(-19deg); opacity: 0.7; }
.sonar-field span:nth-child(3) { top: 61%; transform: rotate(-10deg); opacity: 0.52; }
.sonar-field span:nth-child(4) { top: 82%; transform: rotate(-22deg); opacity: 0.42; }

.depth-gauge {
  position: fixed;
  top: 50%;
  right: 2.2rem;
  z-index: 20;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.depth-gauge::before {
  content: "";
  position: absolute;
  top: -1rem;
  bottom: -1rem;
  right: 0.1rem;
  width: 1px;
  background: linear-gradient(var(--cyan), rgba(99, 215, 232, 0.05));
}

.gauge-tick {
  color: rgba(233, 226, 207, 0.38);
  text-decoration: none;
  padding-right: 1.6rem;
  position: relative;
  transition: color 600ms ease, transform 600ms ease;
}

.gauge-tick::after {
  content: attr(data-depth);
  position: absolute;
  right: -0.4rem;
  top: 0;
  color: var(--cyan);
}

.gauge-tick.active {
  color: var(--ivory);
  transform: translateX(-0.35rem);
}

.narrative {
  position: relative;
  z-index: 5;
}

.chamber {
  position: relative;
  min-height: 104vh;
  padding: 9rem 9vw;
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
  clip-path: polygon(0 6vw, 100% 0, 100% calc(100% - 6vw), 0 100%);
  margin-top: -6vw;
}

.chamber:first-child { margin-top: 0; }

.diagonal-plane {
  position: absolute;
  inset: -14% -8%;
  z-index: -1;
  clip-path: polygon(0 20%, 100% 0, 100% 78%, 0 100%);
  background: linear-gradient(116deg, rgba(0, 16, 24, 0.95), rgba(11, 42, 58, 0.78), rgba(15, 94, 110, 0.18));
  box-shadow: inset 0 0 9rem rgba(0, 16, 24, 0.85);
}

.plane-one { background: linear-gradient(119deg, #001018, #061722 52%, rgba(15, 94, 110, 0.42)); }
.plane-two { background: linear-gradient(112deg, rgba(6, 23, 34, 0.96), rgba(11, 42, 58, 0.9), rgba(180, 154, 99, 0.11)); }
.plane-three { background: linear-gradient(121deg, rgba(11, 42, 58, 0.96), rgba(15, 94, 110, 0.54), rgba(0, 16, 24, 0.9)); }
.plane-four { background: linear-gradient(115deg, rgba(0, 16, 24, 0.98), rgba(6, 23, 34, 0.94), rgba(196, 69, 54, 0.12)); }
.plane-five { background: linear-gradient(118deg, rgba(6, 23, 34, 0.98), rgba(11, 42, 58, 0.86), rgba(180, 154, 99, 0.14)); }

.chamber-copy {
  max-width: 48rem;
  position: relative;
  z-index: 4;
  opacity: 0;
  transform: translateY(3rem);
  transition: opacity 1000ms ease, transform 1000ms ease;
}

.chamber.in-view .chamber-copy {
  opacity: 1;
  transform: translateY(0);
}

.right-edge { margin-left: auto; max-width: 42rem; }
.left-edge { margin-right: auto; }
.narrow { max-width: 36rem; }

.ledger-label {
  font-family: var(--mono);
  color: var(--cyan);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin: 0 0 1.4rem;
}

.ledger-label.red { color: var(--red); }

h1, h2 {
  font-family: var(--serif);
  font-weight: 400;
  margin: 0;
  color: var(--ivory);
  text-wrap: balance;
}

h1 {
  font-size: clamp(5rem, 15vw, 15rem);
  line-height: 0.84;
  letter-spacing: -0.08em;
  text-shadow: 0 0 3rem rgba(99, 215, 232, 0.18);
}

h2 {
  font-size: clamp(2.5rem, 6vw, 6.4rem);
  line-height: 0.98;
  letter-spacing: -0.045em;
}

p {
  font-size: clamp(1.05rem, 1.65vw, 1.35rem);
  line-height: 1.55;
  color: rgba(233, 226, 207, 0.76);
}

.declaration {
  max-width: 40rem;
  margin-top: 2rem;
  font-size: clamp(1.25rem, 2.2vw, 2rem);
}

.manifest-table {
  position: absolute;
  right: 10vw;
  bottom: 13vh;
  width: min(34rem, 42vw);
  transform: rotate(-13deg);
}

.manifest-sheet {
  padding: 2rem;
  color: var(--black-blue);
  background:
    linear-gradient(135deg, rgba(233, 226, 207, 0.94), rgba(233, 226, 207, 0.55)),
    repeating-linear-gradient(0deg, transparent 0 22px, rgba(11, 42, 58, 0.07) 23px);
  box-shadow: 0 2rem 5rem rgba(0, 16, 24, 0.55);
}

.manifest-sheet strong {
  display: block;
  margin: 1rem 0 0.35rem;
  font-family: var(--serif);
  font-size: 1.9rem;
  font-weight: 400;
}

.manifest-sheet em { color: rgba(11, 42, 58, 0.68); font-style: normal; }
.checksum { font-family: var(--mono); font-size: 0.68rem; color: var(--pressure); }

.contours {
  position: absolute;
  width: min(62rem, 70vw);
  z-index: 1;
  fill: none;
  stroke: rgba(99, 215, 232, 0.22);
  stroke-width: 1.2;
  stroke-dasharray: 1200;
  stroke-dashoffset: 1200;
}

.in-view .contours path {
  animation: drawLine 3500ms ease forwards;
}

.contours-a { right: -6vw; top: 10vh; }
.contours-b { left: 38vw; bottom: 10vh; opacity: 0.8; }

.dependency-rack {
  position: absolute;
  left: 8vw;
  top: 24vh;
  width: min(37rem, 46vw);
  display: grid;
  gap: 1rem;
  transform: rotate(-10deg);
}

.capsule {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding: 1rem 1.2rem;
  border: 1px solid rgba(99, 215, 232, 0.22);
  color: var(--ivory);
  background: rgba(6, 23, 34, 0.62);
  box-shadow: 0 1.2rem 3rem rgba(0, 16, 24, 0.34);
  font-family: var(--mono);
  font-size: 0.78rem;
}

.capsule.wide { margin-right: -4rem; }
.capsule.brass { border-color: rgba(180, 154, 99, 0.58); }
.capsule.dim { opacity: 0.48; }
.capsule b { color: var(--cyan); font-weight: 500; }

.license-current {
  position: absolute;
  right: 4vw;
  top: 18vh;
  width: min(45rem, 52vw);
  height: 55vh;
}

.ribbon {
  position: absolute;
  min-width: 18rem;
  padding: 0.9rem 1.4rem;
  color: var(--ivory);
  border-left: 3px solid var(--cyan);
  background: linear-gradient(90deg, rgba(15, 94, 110, 0.66), rgba(15, 94, 110, 0.06));
  font-family: var(--mono);
  font-size: 0.76rem;
  transform: rotate(-16deg);
}

.ribbon:nth-child(1) { top: 3rem; left: 2rem; }
.ribbon:nth-child(2) { top: 11rem; left: 10rem; }
.ribbon:nth-child(3) { top: 20rem; left: 3rem; }
.ribbon:nth-child(4) { top: 29rem; left: 15rem; }
.ribbon.ivory { border-color: var(--ivory); }
.ribbon.warning { border-color: var(--red); color: #FFFFFF; }

.fracture-map {
  position: absolute;
  left: 8vw;
  bottom: 12vh;
  width: min(45rem, 52vw);
  height: 54vh;
  background: linear-gradient(135deg, rgba(0, 16, 24, 0.08), rgba(196, 69, 54, 0.05));
  transform: rotate(-12deg);
}

.fracture {
  position: absolute;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--red), rgba(196, 69, 54, 0.12));
  box-shadow: 0 0 1.5rem rgba(196, 69, 54, 0.5);
  transform-origin: left;
}

.f1 { width: 28rem; top: 35%; left: 6%; transform: rotate(24deg); }
.f2 { width: 18rem; top: 50%; left: 35%; transform: rotate(-31deg); }
.f3 { width: 14rem; top: 64%; left: 18%; transform: rotate(9deg); }

.evidence-tag {
  position: absolute;
  padding: 0.7rem 1rem;
  border: 1px solid rgba(233, 226, 207, 0.24);
  background: rgba(6, 23, 34, 0.78);
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--ivory);
}

.red-tag { border-color: var(--red); color: #FFFFFF; top: 27%; left: 42%; }
.evidence-tag:not(.red-tag) { bottom: 18%; left: 7%; }

.final-copy { max-width: 50rem; }

.brass-stamp {
  display: inline-block;
  margin-top: 1.4rem;
  padding: 0.72rem 1rem;
  border: 1px solid rgba(180, 154, 99, 0.7);
  color: var(--brass);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transform: rotate(-2deg);
  transition: background 500ms ease, color 500ms ease;
}

.brass-stamp:hover { background: rgba(180, 154, 99, 0.14); color: var(--ivory); }

.seal-cluster {
  position: absolute;
  right: 12vw;
  top: 28vh;
  display: flex;
  gap: 1.2rem;
  transform: rotate(-14deg);
}

.seal {
  width: 8rem;
  height: 8rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(233, 226, 207, 0.35);
  color: var(--ivory);
  background: radial-gradient(circle, rgba(233, 226, 207, 0.16), rgba(6, 23, 34, 0.72));
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  box-shadow: 0 0 4rem rgba(99, 215, 232, 0.12);
}

.seal.cyan { border-color: var(--cyan); transform: translateY(4rem); }
.seal.brass { border-color: var(--brass); transform: translateY(1rem); color: var(--brass); }

[data-parallax] {
  transition: transform 120ms linear;
  will-change: transform;
}

@keyframes drawLine {
  to { stroke-dashoffset: 0; }
}

@media (max-width: 820px) {
  .depth-gauge { display: none; }
  .chamber { padding: 8rem 1.4rem; min-height: 110vh; }
  .manifest-table, .dependency-rack, .license-current, .fracture-map, .seal-cluster {
    position: relative;
    inset: auto;
    width: 100%;
    margin-top: 3rem;
  }
  .chamber { display: block; }
  .right-edge { margin-left: 0; }
  .license-current { height: 30rem; }
  .seal-cluster { flex-wrap: wrap; }
  .seal { width: 6.5rem; height: 6.5rem; }
}