:root {
  --deep-bedrock-ink: #071018;
  --phosphor-vellum: #E9F6E8;
  --celadon-proof-glow: #84F7C5;
  --bathypelagic-blue: #0D3B66;
  --oxidized-copper: #C06C3E;
  --pale-mineral-lavender: #B8A7FF;
  --basalt-gray: #2A3441;
  --display: "Newsreader", serif;
  --condensed: "IBM Plex Sans Condensed", sans-serif;
  --mono: "Spline Sans Mono", monospace;
  --catalog: "Alegreya Sans SC", sans-serif;
  --design-font-marker: "Condensed** labels";
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-snap-type: y mandatory; background: var(--deep-bedrock-ink); }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--phosphor-vellum);
  font-family: var(--condensed);
  background:
    radial-gradient(circle at 72% 11%, rgba(184, 167, 255, .19), transparent 30vw),
    radial-gradient(circle at 17% 78%, rgba(132, 247, 197, .1), transparent 28vw),
    linear-gradient(165deg, var(--deep-bedrock-ink), var(--bathypelagic-blue) 48%, var(--deep-bedrock-ink));
  overflow-x: hidden;
}

.grain {
  position: fixed; inset: 0; z-index: 40; pointer-events: none; opacity: .22;
  background-image:
    radial-gradient(circle, rgba(233,246,232,.38) 0 1px, transparent 1.4px),
    repeating-linear-gradient(104deg, transparent 0 12px, rgba(233,246,232,.045) 13px 14px);
  background-size: 23px 23px, 86px 86px;
  mix-blend-mode: overlay;
}

.depth-gauge {
  position: fixed; left: 22px; top: 50%; transform: translateY(-50%); z-index: 30;
  display: grid; gap: 11px; padding: 18px 12px 18px 18px;
  border-left: 1px solid rgba(233,246,232,.34);
  background: linear-gradient(90deg, rgba(7,16,24,.86), rgba(42,52,65,.16));
  backdrop-filter: blur(8px);
}
.gauge-title, .gauge-notch span, .gauge-notch em { font-family: var(--catalog); letter-spacing: .12em; text-transform: lowercase; }
.gauge-title { color: var(--basalt-gray); font-size: 13px; margin-bottom: 4px; }
.gauge-notch { position: relative; display: grid; grid-template-columns: 26px 1fr; gap: 10px; color: rgba(233,246,232,.58); text-decoration: none; }
.gauge-notch::before { content: ""; position: absolute; left: -22px; top: 9px; width: 16px; height: 1px; background: var(--basalt-gray); transition: .45s ease; }
.gauge-notch span { font-size: 12px; font-family: var(--mono); }
.gauge-notch em { font-size: 12px; font-style: normal; }
.gauge-notch.active { color: var(--celadon-proof-glow); text-shadow: 0 0 14px rgba(132,247,197,.45); }
.gauge-notch.active::before { width: 28px; background: var(--celadon-proof-glow); box-shadow: 0 0 12px var(--celadon-proof-glow); }

.core-stage { position: fixed; right: 7vw; top: 50%; width: 290px; height: 66vh; transform: translateY(-50%); z-index: 15; pointer-events: none; }
.fog { position: absolute; border-radius: 999px; filter: blur(30px); opacity: .5; }
.fog-a { inset: 8% -16% auto auto; width: 240px; height: 160px; background: rgba(184,167,255,.2); animation: drift 13s ease-in-out infinite; }
.fog-b { inset: auto 12% 8% auto; width: 300px; height: 180px; background: rgba(132,247,197,.12); animation: drift 17s ease-in-out infinite reverse; }
.core-sample { position: absolute; inset: 6% 54px 11%; transform-style: preserve-3d; transition: transform .75s cubic-bezier(.2,.7,.18,1); }
.core-glass {
  position: absolute; inset: 20px 0; border-radius: 48% / 5%; overflow: hidden;
  border: 1px solid rgba(233,246,232,.44);
  background: linear-gradient(90deg, rgba(233,246,232,.07), rgba(184,167,255,.18), rgba(7,16,24,.15), rgba(233,246,232,.08));
  box-shadow: inset 18px 0 24px rgba(233,246,232,.09), inset -18px 0 30px rgba(7,16,24,.72), 0 0 42px rgba(132,247,197,.1);
}
.core-glass::before { content: ""; position: absolute; inset: 0 42%; background: linear-gradient(180deg, transparent, rgba(233,246,232,.24), transparent); transform: skewX(-8deg); }
.core-cap { position: absolute; left: 0; right: 0; height: 42px; border-radius: 50%; border: 1px solid rgba(233,246,232,.45); background: rgba(233,246,232,.09); }
.core-cap.top { top: 0; } .core-cap.bottom { bottom: 0; }
.core-layer { position: absolute; left: 7%; right: 7%; border-radius: 50%; border-top: 1px solid rgba(233,246,232,.36); transform: skewY(-3deg); }
.core-layer.basalt { bottom: 4%; height: 19%; background: rgba(42,52,65,.8); }
.core-layer.receipts { bottom: 22%; height: 8%; background: rgba(192,108,62,.55); }
.core-layer.metronome { bottom: 33%; height: 12%; background: rgba(184,167,255,.35); }
.core-layer.lantern { bottom: 48%; height: 11%; background: rgba(132,247,197,.34); box-shadow: 0 0 20px rgba(132,247,197,.24); }
.core-layer.fault { bottom: 61%; height: 9%; background: linear-gradient(135deg, transparent 34%, var(--oxidized-copper) 36% 41%, transparent 43%), rgba(13,59,102,.42); }
.core-layer.reef { bottom: 72%; height: 12%; background: radial-gradient(circle at 28% 48%, var(--celadon-proof-glow) 0 4px, transparent 5px), radial-gradient(circle at 64% 55%, var(--celadon-proof-glow) 0 3px, transparent 4px), rgba(184,167,255,.23); }
.core-layer.ring { bottom: 87%; height: 5%; background: rgba(132,247,197,.58); box-shadow: 0 0 24px var(--celadon-proof-glow); }
.embedded { position: absolute; font: 10px var(--mono); color: var(--deep-bedrock-ink); background: rgba(233,246,232,.74); border: 1px solid rgba(7,16,24,.2); padding: 3px 5px; transform: rotate(-7deg); }
.receipt-one { left: 22%; bottom: 26%; } .receipt-two { right: 17%; bottom: 55%; } .receipt-three { left: 15%; bottom: 66%; }
.core-label { position: absolute; bottom: 0; left: -18px; right: -18px; text-align: center; font: 12px var(--mono); color: rgba(233,246,232,.68); letter-spacing: .04em; }

.codex { position: relative; z-index: 5; }
.strata-leaf {
  position: relative; min-height: 100vh; scroll-snap-align: start; padding: 12vh 26vw 10vh 13vw; overflow: hidden;
  display: flex; align-items: center;
  border-top: 1px solid rgba(233,246,232,.08);
}
.strata-leaf::before { content: ""; position: absolute; inset: 8% 18% 8% 8%; border: 1px solid rgba(233,246,232,.1); transform: skewY(-4deg); background: rgba(233,246,232,.025); backdrop-filter: blur(1px); }
.surface { justify-content: center; padding-right: 34vw; background: radial-gradient(circle at 62% 48%, rgba(184,167,255,.16), transparent 28vw); }
.plate {
  position: relative; z-index: 2; max-width: 720px; padding: 36px 42px;
  background: linear-gradient(135deg, rgba(233,246,232,.14), rgba(233,246,232,.04));
  border: 1px solid rgba(233,246,232,.25);
  box-shadow: 0 24px 80px rgba(0,0,0,.28), inset 0 1px rgba(233,246,232,.16);
  backdrop-filter: blur(14px); clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 22px, 100% 100%, 24px 100%, 0 calc(100% - 22px));
  transition: transform .7s ease, opacity .7s ease;
}
.strata-leaf:not(.active) .plate { opacity: .58; transform: translateY(18px); }
.title-plate { text-align: left; }
.citation-tab {
  display: inline-block; margin: 0 0 20px; padding: 6px 14px; transform: translateX(-58px);
  font: 700 13px var(--catalog); letter-spacing: .16em; text-transform: lowercase;
  color: var(--deep-bedrock-ink); background: var(--phosphor-vellum); border-left: 4px solid var(--oxidized-copper);
}
h1, h2 { font-family: var(--display); font-optical-sizing: auto; font-weight: 400; margin: 0; line-height: .94; }
h1 { font-size: clamp(72px, 10vw, 156px); letter-spacing: -.07em; color: var(--phosphor-vellum); text-shadow: 0 0 40px rgba(132,247,197,.12); }
h2 { font-size: clamp(44px, 6vw, 92px); letter-spacing: -.045em; max-width: 740px; }
p { font-size: clamp(20px, 2vw, 27px); line-height: 1.25; color: rgba(233,246,232,.82); }
.lead { max-width: 720px; }
.cross-line { width: 100%; height: 1px; margin: 24px 0; background: linear-gradient(90deg, transparent, var(--celadon-proof-glow), var(--pale-mineral-lavender), transparent); box-shadow: 0 0 18px rgba(132,247,197,.62); }
.specimen-row, .ticker-strip, .archive-ledger { display: flex; flex-wrap: wrap; gap: 12px; font: 12px var(--mono); color: rgba(233,246,232,.66); text-transform: uppercase; letter-spacing: .07em; }
.specimen-row span, .ticker-strip span, .archive-ledger span { border: 1px solid rgba(233,246,232,.22); padding: 7px 10px; background: rgba(7,16,24,.25); }
.contour { position: absolute; left: 8%; bottom: 9%; width: 52vw; opacity: .5; }
.contour path, .bridge-glyph path { fill: none; stroke: var(--celadon-proof-glow); stroke-width: 1.4; stroke-dasharray: 9 9; }
.left-sheet { margin-left: 3vw; } .right-sheet { margin-left: auto; } .narrow { max-width: 590px; }
.layer-mass { position: absolute; inset: auto 36% -8% -5%; height: 46vh; background: linear-gradient(160deg, var(--basalt-gray), var(--deep-bedrock-ink)); clip-path: polygon(0 20%, 35% 6%, 100% 31%, 100% 100%, 0 100%); }
.annotation { position: absolute; z-index: 3; font: 16px var(--catalog); letter-spacing: .08em; color: var(--celadon-proof-glow); border-bottom: 1px solid var(--celadon-proof-glow); padding-bottom: 8px; }
.pin-one { left: 56%; bottom: 24%; }
.wiki-notes { display: grid; grid-template-columns: repeat(2, minmax(160px, 1fr)); gap: 10px; margin-top: 28px; }
.wiki-notes div { padding: 14px; background: rgba(7,16,24,.34); border: 1px solid rgba(233,246,232,.16); }
dt { font: 13px var(--catalog); color: var(--pale-mineral-lavender); letter-spacing: .14em; } dd { margin: 4px 0 0; font-size: 20px; color: var(--phosphor-vellum); }
.sediment-band { position: absolute; left: 0; right: 0; top: 49%; height: 58px; background: rgba(192,108,62,.18); border-top: 1px solid var(--oxidized-copper); border-bottom: 1px solid var(--oxidized-copper); transform: rotate(-5deg) scaleX(1.12); }
.sediment-band span { position: absolute; width: 16%; height: 16px; background: rgba(233,246,232,.42); border-radius: 20px; top: 21px; animation: compress 5s ease-in-out infinite; }
.sediment-band span:nth-child(1){left:10%}.sediment-band span:nth-child(2){left:28%;animation-delay:.2s}.sediment-band span:nth-child(3){left:46%;animation-delay:.4s}.sediment-band span:nth-child(4){left:64%;animation-delay:.6s}.sediment-band span:nth-child(5){left:82%;animation-delay:.8s}
.mono-fragment, .proof-snippets span, .calldata-ribbon { font-family: var(--mono); color: var(--celadon-proof-glow); }
.receipt-fossils { position: absolute; left: 11%; bottom: 17%; display: grid; grid-template-columns: repeat(3, 92px); gap: 12px; transform: rotate(-5deg); }
.receipt-fossils i { font: 13px var(--mono); color: var(--deep-bedrock-ink); background: rgba(233,246,232,.72); padding: 12px 10px; border-radius: 4px; text-align: center; }
.metronome-figure { position: absolute; right: 38%; top: 30%; width: 220px; height: 280px; }
.meter-arc { position: absolute; inset: 0 22px 50px; border: 1px solid rgba(233,246,232,.3); border-bottom: 0; border-radius: 150px 150px 0 0; }
.pendulum { position: absolute; left: 50%; top: 24px; width: 4px; height: 188px; background: var(--oxidized-copper); transform-origin: 50% 12px; animation: tick 2.2s ease-in-out infinite; box-shadow: 0 0 12px rgba(192,108,62,.55); }
.pendulum::after { content: ""; position: absolute; bottom: -14px; left: -16px; width: 36px; height: 36px; border-radius: 50%; background: var(--oxidized-copper); }
.meter-base { position: absolute; bottom: 0; left: 38px; right: 38px; padding: 16px; text-align: center; background: rgba(192,108,62,.62); font: 700 22px var(--catalog); color: var(--deep-bedrock-ink); }
.ticker-strip { position: absolute; left: 14%; bottom: 15%; }
.lantern-field { position: absolute; inset: 17% 35% 14% 14%; }
.lantern-field span { position: absolute; width: 34px; height: 54px; border: 1px solid var(--celadon-proof-glow); border-radius: 18px 18px 9px 9px; background: radial-gradient(circle at 50% 68%, rgba(132,247,197,.95), rgba(132,247,197,.08) 55%, transparent 70%); box-shadow: 0 0 34px rgba(132,247,197,.58); animation: ignite 3.6s ease-in-out infinite; }
.lantern-field span:nth-child(1){left:10%;top:22%}.lantern-field span:nth-child(2){left:33%;top:50%;animation-delay:.35s}.lantern-field span:nth-child(3){left:58%;top:18%;animation-delay:.7s}.lantern-field span:nth-child(4){left:74%;top:62%;animation-delay:1.05s}.lantern-field span:nth-child(5){left:45%;top:78%;animation-delay:1.4s}
.proof-snippets { display: flex; gap: 10px; flex-wrap: wrap; } .proof-snippets span { padding: 7px 10px; border: 1px solid rgba(132,247,197,.35); }
.fault-seam { position: absolute; inset: -10% 43% -10% auto; width: 120px; background: linear-gradient(118deg, transparent 42%, var(--oxidized-copper) 43% 47%, rgba(192,108,62,.18) 48% 54%, transparent 55%); filter: drop-shadow(0 0 18px rgba(192,108,62,.5)); }
.warning-slip { margin-top: 22px; padding: 12px 14px; color: var(--deep-bedrock-ink); background: var(--oxidized-copper); font: 15px var(--catalog); letter-spacing: .08em; }
.bridge-glyph { position: absolute; right: 24%; bottom: 17%; width: 340px; opacity: .8; }
.reef-grid { position: absolute; left: 11%; top: 22%; width: 36vw; min-width: 340px; display: grid; grid-template-columns: repeat(6, 1fr); gap: 13px; transform: rotate(-8deg); }
.reef-grid span { aspect-ratio: 1; border: 1px solid rgba(132,247,197,.42); background: linear-gradient(135deg, rgba(132,247,197,.48), rgba(184,167,255,.22)); box-shadow: 0 0 18px rgba(132,247,197,.16); animation: reef 4s ease-in-out infinite; }
.reef-grid span:nth-child(3n){animation-delay:.4s}.reef-grid span:nth-child(4n){animation-delay:.8s}.reef-grid span:nth-child(5n){animation-delay:1.2s}
.calldata-ribbon { position: absolute; left: 13%; bottom: 16%; padding: 10px 16px; border: 1px solid rgba(132,247,197,.36); background: rgba(7,16,24,.56); transform: rotate(-3deg); }
.final-sheet { margin: auto; text-align: center; max-width: 820px; }
.finality-ring { position: absolute; inset: 50% auto auto 50%; width: 42vw; height: 42vw; max-width: 580px; max-height: 580px; transform: translate(-50%,-50%); border: 2px solid rgba(132,247,197,.48); border-radius: 50%; box-shadow: 0 0 70px rgba(132,247,197,.24), inset 0 0 70px rgba(132,247,197,.08); }
.finality-ring span { position: absolute; inset: 9%; border-radius: 50%; border: 1px dashed var(--celadon-proof-glow); animation: seal 9s linear infinite; }

@keyframes drift { 50% { transform: translate(-24px, 18px) scale(1.08); } }
@keyframes compress { 50% { transform: scaleX(.42); background: rgba(132,247,197,.55); } }
@keyframes tick { 0%,100% { transform: rotate(-23deg); } 50% { transform: rotate(23deg); } }
@keyframes ignite { 0%,100% { opacity: .42; transform: translateY(8px); } 50% { opacity: 1; transform: translateY(0); } }
@keyframes reef { 50% { transform: translateY(-9px); background: linear-gradient(135deg, rgba(132,247,197,.78), rgba(184,167,255,.34)); } }
@keyframes seal { to { transform: rotate(360deg); } }

@media (max-width: 980px) {
  .depth-gauge { left: 8px; padding-left: 12px; }
  .gauge-notch { grid-template-columns: 24px; }
  .gauge-notch em, .gauge-title { display: none; }
  .core-stage { right: -74px; width: 230px; opacity: .72; }
  .strata-leaf { padding: 14vh 82px 10vh 58px; }
  .surface { padding-right: 78px; }
  .plate { padding: 28px 26px; }
  .citation-tab { transform: translateX(-34px); }
  .reef-grid, .metronome-figure, .receipt-fossils { opacity: .52; }
}