:root {
  /* DESIGN FONT TOKENS: IBM Plex Sans Condensed** Condensed* for marginalia; Source Sans 3** 3* for body copy. */
  --abyss: #05060A;
  --violet: #171225;
  --bone: #E6DDC9;
  --green: #7CFF6B;
  --magenta: #FF4B9B;
  --teal: #2DD4BF;
  --blood: #7A2435;
  --body: "Source Sans 3", system-ui, sans-serif;
  --display: "Alegreya Sans", "Source Sans 3", sans-serif;
  --index: "IBM Plex Sans Condensed", "Arial Narrow", sans-serif;
}

* { box-sizing: border-box; }
html { background: var(--abyss); scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--bone);
  background:
    radial-gradient(circle at 70% 10%, rgba(122, 36, 53, .32), transparent 34rem),
    radial-gradient(circle at 15% 35%, rgba(45, 212, 191, .08), transparent 28rem),
    linear-gradient(180deg, var(--abyss), #080711 46%, var(--abyss));
  font-family: var(--body);
  overflow-x: hidden;
}

#particle-field { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 1; pointer-events: none; mix-blend-mode: screen; }
.grain { position: fixed; inset: 0; z-index: 2; pointer-events: none; opacity: .16; background-image: radial-gradient(rgba(230,221,201,.25) 1px, transparent 1px); background-size: 3px 3px; }
.cursor-dust { position: fixed; width: 9rem; height: 9rem; border-radius: 50%; background: radial-gradient(circle, rgba(45,212,191,.16), transparent 68%); transform: translate(-50%, -50%); z-index: 3; pointer-events: none; filter: blur(8px); opacity: .75; }

.archive-nav { position: fixed; left: 2rem; right: 2rem; top: 1.25rem; z-index: 10; display: flex; justify-content: space-between; font-family: var(--index); letter-spacing: .18em; font-size: .78rem; color: rgba(230,221,201,.68); text-transform: uppercase; }
.nav-stamp { color: var(--green); text-shadow: 0 0 18px rgba(124,255,107,.42); }

.spread { position: relative; min-height: 100vh; display: grid; grid-template-columns: repeat(12, 1fr); gap: 1.2rem; padding: 7rem clamp(1.3rem, 4vw, 5rem) 5rem; isolation: isolate; border-top: 1px solid rgba(230,221,201,.08); overflow: hidden; }
.spread::before { content: ""; position: absolute; inset: 4rem clamp(1rem, 3vw, 4rem); z-index: -2; background: linear-gradient(135deg, rgba(23,18,37,.72), rgba(5,6,10,.18) 48%, rgba(122,36,53,.18)); border: 1px solid rgba(230,221,201,.07); box-shadow: inset 0 0 80px rgba(0,0,0,.65); }
.spread::after { content: attr(data-chapter); position: absolute; right: 5vw; bottom: 3vh; z-index: -1; font: 900 34vw/.75 var(--display); color: rgba(230,221,201,.025); }
.rail { grid-column: 1; align-self: stretch; display: flex; align-items: flex-start; gap: 1rem; writing-mode: vertical-rl; transform: rotate(180deg); font-family: var(--index); letter-spacing: .2em; color: rgba(230,221,201,.48); text-transform: uppercase; }
.rail span { color: var(--magenta); font-weight: 700; }
.vertical-title { grid-column: 2 / 4; align-self: center; writing-mode: vertical-rl; margin: 0; font: 900 clamp(4rem, 10vw, 9rem)/.78 var(--display); letter-spacing: -.05em; color: var(--bone); text-shadow: 0 0 44px rgba(255,75,155,.18); }
.vertical-title.right { grid-column: 10 / 12; justify-self: end; }

.opening { min-height: 112vh; padding-top: 8rem; }
.opening::before { opacity: .42; }
.opening-swarm { position: absolute; left: 50%; top: 47%; transform: translate(-50%, -50%); font: 700 clamp(1.1rem, 2.3vw, 2.4rem) var(--index); letter-spacing: .34em; color: var(--green); text-transform: uppercase; text-shadow: 0 0 16px rgba(124,255,107,.9), 0 0 54px rgba(45,212,191,.42); animation: swarmWord 4s ease both; z-index: 3; }
.hero-copy { grid-column: 2 / 7; align-self: end; padding-bottom: 7vh; z-index: 4; }
.hero-copy h1 { margin: 0 0 1rem; font: 900 clamp(5rem, 15vw, 15rem)/.72 var(--display); letter-spacing: -.08em; color: var(--bone); }
.hero-copy p:last-child { max-width: 34rem; font-size: clamp(1.15rem, 2vw, 1.55rem); color: rgba(230,221,201,.76); }
.kicker { margin: 0 0 .8rem; font-family: var(--index); color: var(--teal); letter-spacing: .22em; text-transform: uppercase; font-weight: 700; }
.marginal, .annotation, .feeding-chart { font-family: var(--index); letter-spacing: .16em; text-transform: uppercase; font-size: .82rem; color: rgba(230,221,201,.72); }
.marginal { grid-column: 9 / 12; align-self: center; display: grid; gap: .75rem; border-left: 1px solid rgba(124,255,107,.35); padding-left: 1.2rem; }
.marginal span, .annotation span, .feeding-chart span { display: block; opacity: 0; transform: translateY(12px); transition: opacity .8s ease, transform .8s ease; }
.is-visible .marginal span, .is-visible .annotation span, .is-visible .feeding-chart span { opacity: 1; transform: none; }
.is-visible span:nth-child(2) { transition-delay: .16s; } .is-visible span:nth-child(3) { transition-delay: .32s; } .is-visible span:nth-child(4) { transition-delay: .48s; }

.caption { position: relative; z-index: 3; max-width: 34rem; }
.caption h3, .autopsy-board h3, .final-copy h3 { margin: 0 0 1rem; font: 900 clamp(2.3rem, 4vw, 4.4rem)/.88 var(--display); letter-spacing: -.04em; }
.caption p:not(.kicker), .autopsy-board p, .final-copy p:not(.kicker) { margin: 0; font-size: clamp(1rem, 1.45vw, 1.28rem); line-height: 1.55; color: rgba(230,221,201,.76); }
.caption-low { grid-column: 5 / 9; align-self: end; margin-bottom: 10vh; }
.caption-high { grid-column: 3 / 7; align-self: start; margin-top: 9vh; }
.right-note { grid-column: 10 / 12; align-self: end; display: grid; gap: .8rem; color: var(--magenta); }
.left-note { grid-column: 2 / 4; align-self: end; display: grid; gap: .8rem; color: var(--green); }
.seal-cluster { grid-column: 7 / 11; align-self: center; display: grid; grid-template-columns: repeat(2, minmax(7rem, 12rem)); gap: 2rem; justify-content: center; }
.seal-cluster span { display: grid; place-items: center; aspect-ratio: 1; border: 1px solid rgba(230,221,201,.14); border-radius: 50%; color: var(--green); font-size: 3rem; background: radial-gradient(circle, rgba(124,255,107,.11), transparent 58%); box-shadow: 0 0 40px rgba(124,255,107,.08), inset 0 0 30px rgba(0,0,0,.7); }

.specimen { position: absolute; z-index: 2; transform-style: preserve-3d; transition: transform .8s ease-out; filter: drop-shadow(0 30px 50px rgba(0,0,0,.7)); }
.specimen-alpha { width: min(48vw, 48rem); height: min(48vw, 48rem); right: 11vw; top: 19vh; opacity: 0; animation: specimenReveal 3s 1.2s ease forwards; }
.specimen-alpha .core { position: absolute; inset: 18%; border-radius: 46% 54% 42% 58%; background: radial-gradient(circle at 32% 24%, rgba(230,221,201,.22), transparent 18%), radial-gradient(circle at 62% 52%, rgba(124,255,107,.2), transparent 29%), linear-gradient(135deg, #12101d, #030407 58%, #201022); box-shadow: inset -22px -35px 80px rgba(0,0,0,.9), 0 0 44px rgba(45,212,191,.22); }
.horn { position: absolute; width: 34%; height: 52%; background: linear-gradient(135deg, rgba(45,212,191,.85), rgba(23,18,37,.1) 45%, rgba(255,75,155,.28)); clip-path: polygon(50% 0, 100% 100%, 0 78%); filter: blur(.2px); }
.h1 { left: 8%; top: 2%; transform: rotate(-32deg); } .h2 { right: 5%; top: 4%; transform: rotate(28deg) scaleX(-1); }
.glow-ring { position: absolute; inset: 10%; border: 1px solid rgba(124,255,107,.34); border-radius: 50%; box-shadow: 0 0 45px rgba(124,255,107,.24); animation: slowSpin 20s linear infinite; }
.specimen-beta { width: 38vw; height: 38vw; right: 14vw; top: 24vh; }
.cube { position: absolute; border: 1px solid rgba(45,212,191,.55); background: linear-gradient(135deg, rgba(45,212,191,.24), rgba(124,255,107,.08)); box-shadow: inset 0 0 40px rgba(124,255,107,.12), 0 0 35px rgba(45,212,191,.18); transform: rotate(45deg) skew(-8deg); }
.c1 { inset: 12% 26% 36% 18%; } .c2 { inset: 45% 12% 10% 48%; border-color: rgba(255,75,155,.46); }
.spine { position: absolute; left: 48%; top: 9%; width: 5%; height: 78%; background: linear-gradient(var(--green), var(--teal)); clip-path: polygon(50% 0, 100% 10%, 55% 18%, 100% 28%, 54% 37%, 100% 48%, 50% 100%, 0 48%, 45% 37%, 0 28%, 45% 18%, 0 10%); opacity: .8; }
.eye { position: absolute; left: 42%; top: 40%; width: 18%; height: 11%; border-radius: 50%; background: var(--magenta); box-shadow: 0 0 32px var(--magenta); }
.feeding-chart { grid-column: 8 / 10; align-self: end; display: grid; gap: .75rem; margin-bottom: 12vh; color: var(--teal); }
.mechanic .autopsy-board { grid-column: 5 / 9; align-self: center; z-index: 3; }
.claw-lines { display: grid; gap: .7rem; margin-bottom: 2rem; }
.claw-lines i { height: 2px; background: linear-gradient(90deg, transparent, var(--blood), var(--magenta), transparent); transform: skewY(-8deg); }
.specimen-gamma { width: 36vw; height: 30vw; right: 7vw; bottom: 15vh; }
.controller-claw { position: absolute; inset: 20% 8%; background: linear-gradient(135deg, #11101b, #040407 60%, rgba(122,36,53,.8)); clip-path: polygon(8% 62%, 32% 28%, 45% 42%, 58% 14%, 72% 31%, 94% 18%, 78% 73%, 56% 62%, 42% 88%); box-shadow: inset 0 0 45px rgba(0,0,0,.9), 0 0 40px rgba(255,75,155,.13); }
.joint { position: absolute; width: 3.8rem; height: 3.8rem; border-radius: 50%; background: radial-gradient(circle, var(--green), transparent 58%); box-shadow: 0 0 30px rgba(124,255,107,.5); }
.j1 { left: 32%; top: 35%; } .j2 { left: 55%; top: 26%; } .j3 { left: 70%; top: 47%; }
.chamber-copy { grid-column: 3 / 7; align-self: end; margin-bottom: 11vh; }
.chamber-window { grid-column: 7 / 11; align-self: center; position: relative; height: min(54vw, 34rem); border: 1px solid rgba(230,221,201,.12); background: radial-gradient(circle at 50% 45%, rgba(124,255,107,.22), transparent 24%), linear-gradient(135deg, rgba(23,18,37,.8), rgba(5,6,10,.5)); box-shadow: inset 0 0 90px rgba(0,0,0,.8), 0 0 60px rgba(45,212,191,.08); transform-style: preserve-3d; }
.mask { position: absolute; inset: 22% 28%; clip-path: polygon(50% 0, 86% 20%, 94% 67%, 62% 100%, 23% 88%, 5% 40%); background: linear-gradient(135deg, rgba(230,221,201,.16), rgba(5,6,10,.88)); border: 1px solid rgba(124,255,107,.25); }
.halo { position: absolute; inset: 14%; border-radius: 50%; border: 1px dashed rgba(45,212,191,.4); animation: slowSpin 28s linear infinite reverse; }
.glyph { position: absolute; color: var(--green); font-family: var(--index); font-size: 2.2rem; text-shadow: 0 0 18px var(--green); } .g1 { left: 18%; top: 20%; color: var(--magenta); } .g2 { right: 20%; top: 30%; } .g3 { left: 54%; bottom: 18%; color: var(--teal); }
.chamber-log { grid-column: 10 / 12; align-self: start; margin-top: 7vh; }
.seal { place-items: center; text-align: center; }
.seal-title { grid-column: 2 / 12; margin: 0; font: 900 clamp(5rem, 18vw, 18rem)/.75 var(--display); letter-spacing: -.08em; z-index: 3; }
.final-emblem { grid-column: 5 / 9; position: relative; width: min(44vw, 27rem); aspect-ratio: 1; display: grid; place-items: center; margin-top: -3rem; }
.final-emblem .ring { position: absolute; inset: 0; border: 1px solid rgba(124,255,107,.45); border-radius: 50%; box-shadow: inset 0 0 70px rgba(124,255,107,.08), 0 0 60px rgba(124,255,107,.14); }
.monogram { font: 900 10rem var(--display); color: var(--bone); text-shadow: 0 0 24px rgba(255,75,155,.45); }
.slash { position: absolute; width: 110%; height: 2px; background: linear-gradient(90deg, transparent, var(--magenta), var(--teal), transparent); transform: rotate(-28deg); }
.final-copy { grid-column: 4 / 10; max-width: 48rem; z-index: 3; }
.archive-footer { grid-column: 2 / 12; width: 100%; display: flex; justify-content: space-between; margin-top: 4rem; font-family: var(--index); letter-spacing: .18em; color: rgba(230,221,201,.55); }

.reveal-stack > * { opacity: 0; transform: translateY(24px); filter: blur(10px); transition: opacity 1s ease, transform 1s ease, filter 1s ease; }
.is-visible .reveal-stack > *, .is-visible.reveal-stack > * { opacity: 1; transform: none; filter: blur(0); }
.is-visible .reveal-stack > *:nth-child(2) { transition-delay: .18s; } .is-visible .reveal-stack > *:nth-child(3) { transition-delay: .36s; }

@keyframes swarmWord { 0% { opacity: 0; filter: blur(18px); letter-spacing: .9em; } 35% { opacity: 1; } 100% { opacity: .34; filter: blur(1px); letter-spacing: .34em; } }
@keyframes specimenReveal { to { opacity: .86; transform: translate3d(0,0,0) rotateX(0deg) rotateY(0deg); } }
@keyframes slowSpin { to { transform: rotate(360deg); } }

@media (max-width: 820px) {
  .archive-nav { left: 1rem; right: 1rem; font-size: .65rem; }
  .spread { display: block; padding: 6rem 1.1rem 4rem 3.2rem; }
  .spread::before { inset: 4rem .7rem 2rem 2.6rem; }
  .rail { position: absolute; left: .75rem; top: 6rem; bottom: 4rem; }
  .vertical-title, .vertical-title.right { writing-mode: horizontal-tb; font-size: clamp(3.5rem, 18vw, 6rem); margin-bottom: 2rem; }
  .hero-copy h1 { font-size: clamp(4rem, 22vw, 7rem); }
  .specimen { opacity: .45; }
  .specimen-alpha, .specimen-beta, .specimen-gamma { width: 76vw; height: 76vw; right: -15vw; top: 18vh; }
  .caption, .autopsy-board, .final-copy { margin: 6rem 0 0; }
  .seal-cluster { grid-template-columns: repeat(2, 1fr); display: grid; margin-top: 4rem; }
  .chamber-window { height: 70vw; margin-top: 4rem; }
  .archive-footer { display: grid; gap: 1rem; font-size: .7rem; }
}