:root {
  /* Typography compliance: Space Grotesk* Grotesk** primary geometric-sans voice: clipped by viewport while pearl moon rises behind the dot. A thin cyan fish swims through the letters. */
  --ink-night: #08030A;
  --acid-coral: #FF4D6D;
  --velvet-oxblood: #3A0718;
  --electric-koi-cyan: #24F6E8;
  --moon-pearl: #FFF3DE;
  --mango-gold: #FFB000;
  --royal-burgundy: #74112F;
  --ultraviolet-plum: #7D2CFF;
  --elastic: cubic-bezier(.2, 1.5, .3, 1);
  --sans: "Space Grotesk", "Space", "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: "Fraunces", Georgia, serif;
  --jp: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--moon-pearl);
  font-family: var(--sans);
  background:
    radial-gradient(circle at 76% 8%, rgba(125, 44, 255, .34), transparent 26rem),
    radial-gradient(circle at 12% 35%, rgba(255, 77, 109, .18), transparent 28rem),
    linear-gradient(120deg, var(--ink-night), var(--velvet-oxblood) 42%, var(--royal-burgundy));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(90deg, rgba(255,243,222,.045) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255,243,222,.032) 1px, transparent 1px);
  background-size: 8.333vw 100vh, 100vw 12.5vh;
  mask-image: radial-gradient(circle at center, black, transparent 78%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 20;
  background: linear-gradient(90deg, rgba(8,3,10,.42), transparent 18%, transparent 82%, rgba(8,3,10,.46));
  mix-blend-mode: multiply;
}

a { color: inherit; text-decoration: none; }

.manuscript { position: relative; }

.chapter {
  min-height: 100vh;
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-template-rows: repeat(8, 12.5vh);
  isolation: isolate;
  padding: clamp(1rem, 3vw, 3rem);
}

.folio-index {
  position: fixed;
  right: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: .9rem;
  z-index: 40;
  font-family: var(--jp);
  color: var(--moon-pearl);
  background: rgba(58, 7, 24, .44);
  border: 1px solid rgba(255, 243, 222, .2);
  border-radius: 999px;
  padding: .7rem .45rem;
  box-shadow: 0 0 32px rgba(36, 246, 232, .12);
}

.folio-index a {
  width: 1.7rem;
  height: 1.7rem;
  display: grid;
  place-items: center;
  color: rgba(255, 243, 222, .54);
  border-radius: 50%;
  transition: color .4s var(--elastic), background .4s var(--elastic), transform .4s var(--elastic);
}

.folio-index a.active {
  color: var(--ink-night);
  background: var(--mango-gold);
  transform: scale(1.22);
}

.moon-phase {
  position: fixed;
  left: 1.25rem;
  top: 1.25rem;
  z-index: 45;
  width: 3.4rem;
  height: 3.4rem;
  border-radius: 50%;
  border: 1px solid rgba(255, 243, 222, .38);
  display: grid;
  place-items: center;
  background: rgba(8, 3, 10, .45);
  box-shadow: 0 0 22px rgba(255, 176, 0, .22);
}

.moon-phase span {
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 32%, #ffffff, var(--moon-pearl) 58%, var(--mango-gold));
  box-shadow: inset var(--phase-x, 0rem) 0 0 rgba(8, 3, 10, .72), 0 0 16px rgba(255, 243, 222, .55);
}

.cursor-pond {
  position: fixed;
  left: 0;
  top: 0;
  width: 9rem;
  height: 9rem;
  border-radius: 50%;
  pointer-events: none;
  z-index: 39;
  opacity: 0;
  transform: translate(-50%, -50%) scale(.6);
  background: radial-gradient(circle, rgba(36, 246, 232, .23), rgba(255, 77, 109, .13) 35%, transparent 68%);
  filter: blur(2px);
  transition: opacity .5s ease;
  mix-blend-mode: screen;
}

.hero { background: radial-gradient(circle at 60% 25%, rgba(255,176,0,.14), transparent 25rem), linear-gradient(140deg, var(--ink-night), var(--velvet-oxblood) 45%, var(--royal-burgundy)); }

.curtain {
  position: absolute;
  top: -5vh;
  bottom: -5vh;
  width: 32vw;
  background: repeating-linear-gradient(90deg, rgba(116,17,47,.82), rgba(116,17,47,.82) 1rem, rgba(58,7,24,.98) 1.6rem, rgba(8,3,10,.86) 2.8rem);
  filter: drop-shadow(0 0 40px rgba(8,3,10,.8));
  z-index: -1;
  transition: transform 1.2s var(--elastic);
}

.curtain-left { left: -14vw; transform: skewX(-5deg) translateX(calc(var(--scroll, 0) * -5vw)); }
.curtain-right { right: -14vw; transform: skewX(5deg) translateX(calc(var(--scroll, 0) * 5vw)); }

.moon {
  border-radius: 50%;
  background: radial-gradient(circle at 34% 30%, #fff, var(--moon-pearl) 56%, var(--mango-gold) 80%, rgba(255,176,0,.2));
  box-shadow: 0 0 70px rgba(255, 243, 222, .38), 0 0 160px rgba(255, 176, 0, .24);
}

.moon-hero {
  grid-column: 7 / 11;
  grid-row: 1 / 5;
  align-self: end;
  justify-self: center;
  width: min(40vw, 31rem);
  aspect-ratio: 1;
  transform: translateY(calc(18vh - var(--scroll, 0) * 20vh));
  z-index: -1;
}

.jp-mark {
  grid-column: 11 / 12;
  grid-row: 2 / 7;
  justify-self: center;
  writing-mode: vertical-rl;
  color: var(--electric-koi-cyan);
  font-family: var(--jp);
  letter-spacing: .5em;
  font-size: .78rem;
}

.wordmark {
  grid-column: 1 / 13;
  grid-row: 2 / 6;
  align-self: center;
  margin: 0;
  font-size: clamp(5.2rem, 19vw, 20rem);
  line-height: .72;
  letter-spacing: var(--word-space, -.11em);
  font-weight: 800;
  color: var(--moon-pearl);
  text-shadow: 0 .08em 0 rgba(255,77,109,.42), 0 0 38px rgba(125,44,255,.36);
  transform: scaleX(var(--word-scale, 1));
  transform-origin: 40% 50%;
  transition: letter-spacing .45s var(--elastic), transform .45s var(--elastic);
  mix-blend-mode: lighten;
}

.wordmark em { color: var(--mango-gold); font-style: normal; margin-inline: .02em; }

.editorial-copy { position: relative; z-index: 3; }
.hero-copy { grid-column: 2 / 7; grid-row: 6 / 8; align-self: start; max-width: 44rem; }
.folio { display: inline-block; color: var(--electric-koi-cyan); font-size: .75rem; text-transform: uppercase; letter-spacing: .22em; margin-bottom: .85rem; }
.editorial-copy h2, .spread h2, .chapter-title-block h2, .palace-headline h2, .finale h2 {
  margin: 0;
  font-size: clamp(2.2rem, 6.2vw, 7rem);
  line-height: .88;
  letter-spacing: -.075em;
}

.editorial-copy p, .spread p, .palace-text, .final-caption, .algorithm-caption {
  font-size: clamp(1rem, 1.7vw, 1.45rem);
  line-height: 1.42;
  color: rgba(255, 243, 222, .82);
}

.fraunces { font-family: var(--serif); font-style: italic; }

.commit-note {
  grid-column: 9 / 12;
  grid-row: 7 / 8;
  align-self: end;
  padding: 1rem;
  border-left: 2px solid var(--acid-coral);
  background: rgba(8, 3, 10, .38);
  color: var(--moon-pearl);
  font-size: .85rem;
  letter-spacing: .04em;
}

.fish {
  position: absolute;
  height: 5.4rem;
  border-radius: 62% 42% 48% 58% / 58% 44% 56% 42%;
  background:
    radial-gradient(circle at 28% 45%, #fff 0 .18rem, transparent .22rem),
    radial-gradient(circle at 34% 45%, var(--electric-koi-cyan), transparent 1.6rem),
    linear-gradient(100deg, rgba(36,246,232,.92), rgba(255,77,109,.82) 52%, rgba(255,176,0,.78));
  box-shadow: 0 0 24px rgba(36,246,232,.52), 0 0 70px rgba(255,77,109,.22);
  filter: saturate(1.2);
  transform-origin: 50% 50%;
}

.fish::before, .fish::after {
  content: "";
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  border-radius: 50% 10% 50% 10%;
  background: linear-gradient(135deg, rgba(255,243,222,.7), rgba(36,246,232,.18));
  filter: blur(.2px);
}

.fish::before { right: -2.5rem; width: 3.3rem; height: 4.7rem; transform: translateY(-50%) rotate(43deg); }
.fish::after { left: 37%; top: -1.1rem; width: 3.4rem; height: 2rem; transform: rotate(-16deg); opacity: .58; }
.fish span { position: absolute; inset: auto 8% 18% 18%; color: var(--ink-night); font-size: .65rem; white-space: nowrap; font-weight: 800; letter-spacing: .04em; }

.hero-fish { width: 26rem; left: -30rem; top: 38vh; animation: heroSwim 8s var(--elastic) infinite; z-index: 6; }
.ribbon-fish { height: 3.2rem; border-radius: 80% 30% 70% 28% / 65% 30% 70% 35%; }
.koi-fish { width: 20rem; }
.angel-fish { width: 15rem; clip-path: polygon(0 50%, 22% 18%, 56% 6%, 90% 48%, 56% 92%, 20% 82%); }

@keyframes heroSwim {
  0% { transform: translateX(0) scaleX(1.65) rotate(-4deg); }
  38% { transform: translateX(60vw) scaleX(.78) rotate(4deg); }
  62% { transform: translateX(82vw) scaleX(1.25) rotate(-2deg); }
  100% { transform: translateX(135vw) scaleX(1.55) rotate(2deg); }
}

.runtime { background: linear-gradient(90deg, var(--velvet-oxblood), var(--royal-burgundy) 55%, var(--ink-night)); }
.stage-label { grid-column: 1 / 3; grid-row: 1 / 8; writing-mode: vertical-rl; font-size: clamp(3rem, 8vw, 9rem); line-height: .8; font-weight: 800; letter-spacing: -.08em; color: rgba(255,243,222,.08); }
.sliding-panel { position: absolute; inset-block: 0; width: 52vw; background: linear-gradient(90deg, rgba(8,3,10,.25), rgba(116,17,47,.9), rgba(255,77,109,.14)); box-shadow: 0 0 80px rgba(8,3,10,.55); }
.panel-a { left: -8vw; transform: translateX(calc(var(--runtime, 0) * -12vw)); }
.panel-b { right: -8vw; transform: translateX(calc(var(--runtime, 0) * 12vw)); }
.moon-small { grid-column: 9 / 12; grid-row: 2 / 5; width: min(23vw, 18rem); aspect-ratio: 1; align-self: center; justify-self: center; opacity: .86; }
.spread-left { grid-column: 3 / 9; grid-row: 3 / 7; z-index: 2; }
.lacquer-card { grid-column: 8 / 12; grid-row: 6 / 8; z-index: 3; align-self: start; padding: 1.4rem; background: rgba(255,243,222,.93); color: var(--velvet-oxblood); border-radius: 1.4rem; box-shadow: 0 1rem 4rem rgba(8,3,10,.35), inset 0 0 0 1px rgba(116,17,47,.2); transform: rotate(-3deg); display: grid; gap: .45rem; }
.lacquer-card b { color: var(--acid-coral); font-size: 1.3rem; }
.vertical-note { grid-column: 12 / 13; grid-row: 2 / 7; writing-mode: vertical-rl; font-family: var(--jp); color: var(--mango-gold); letter-spacing: .35em; }

.algorithm { background: radial-gradient(circle at 45% 50%, rgba(36,246,232,.12), transparent 30rem), linear-gradient(145deg, var(--ink-night), var(--velvet-oxblood)); }
.trail-svg { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; }
.trail-svg path { fill: none; stroke: url(#none); stroke: var(--acid-coral); stroke-width: 4; stroke-dasharray: 10 20; opacity: .72; filter: drop-shadow(0 0 12px var(--electric-koi-cyan)); }
.chapter-title-block { grid-column: 2 / 8; grid-row: 2 / 5; z-index: 4; }
.fish-one { left: 9vw; top: 55vh; animation: swimOne 10s var(--elastic) infinite; }
.fish-two { right: 8vw; top: 28vh; animation: swimTwo 12s var(--elastic) infinite; }
.fish-three { left: 45vw; top: 68vh; width: 18rem; animation: swimThree 9s var(--elastic) infinite; }
.algorithm-caption { grid-column: 7 / 11; grid-row: 6 / 8; z-index: 5; padding: 1.2rem; background: rgba(58,7,24,.56); border-top: 1px solid var(--mango-gold); }
.glyph-orbit { position: absolute; right: 13vw; top: 22vh; width: 22rem; height: 22rem; border-radius: 50%; border: 1px solid rgba(255,243,222,.16); animation: orbitSpin 20s linear infinite; }
.glyph-orbit i { position: absolute; font-style: normal; color: var(--electric-koi-cyan); text-shadow: 0 0 12px currentColor; }
.glyph-orbit i:nth-child(1) { left: 50%; top: -1rem; }
.glyph-orbit i:nth-child(2) { right: -1rem; top: 36%; }
.glyph-orbit i:nth-child(3) { right: 18%; bottom: 2%; }
.glyph-orbit i:nth-child(4) { left: 12%; bottom: 5%; color: var(--acid-coral); }
.glyph-orbit i:nth-child(5) { left: -1rem; top: 42%; color: var(--mango-gold); }
.glyph-orbit i:nth-child(6) { left: 20%; top: 9%; }
@keyframes swimOne { 0%,100%{ transform: translateX(-14vw) scaleX(1.45) rotate(2deg);} 45%{ transform: translateX(42vw) scaleX(.82) rotate(-8deg);} 70%{ transform: translateX(58vw) scaleX(1.2) rotate(3deg);} }
@keyframes swimTwo { 0%,100%{ transform: translateX(12vw) scaleX(-1.2) rotate(-4deg);} 50%{ transform: translateX(-45vw) scaleX(-.75) rotate(7deg);} }
@keyframes swimThree { 0%,100%{ transform: translate(-10vw, 0) scaleX(1.7);} 55%{ transform: translate(20vw, -35vh) scaleX(.7) rotate(-18deg);} }
@keyframes orbitSpin { to { transform: rotate(360deg); } }

.palace { background: linear-gradient(120deg, var(--royal-burgundy), var(--velvet-oxblood) 48%, var(--ink-night)); }
.window-stack { grid-column: 2 / 8; grid-row: 2 / 8; position: relative; z-index: 1; }
.palace-window { position: absolute; border: 2px solid rgba(255,243,222,.72); border-radius: 999px 999px 1.2rem 1.2rem; background: linear-gradient(140deg, rgba(255,243,222,.16), rgba(36,246,232,.08)); box-shadow: inset 0 0 0 1rem rgba(116,17,47,.22), 0 0 50px rgba(255,176,0,.15); }
.w1 { inset: 0 18% 2% 0; }
.w2 { inset: 12% 4% 0 19%; transform: rotate(5deg); border-color: var(--mango-gold); }
.w3 { inset: 24% 26% 13% 33%; transform: rotate(-8deg); border-color: var(--electric-koi-cyan); }
.palace-headline { grid-column: 6 / 12; grid-row: 2 / 5; z-index: 4; }
.palace-text { grid-column: 7 / 11; grid-row: 6 / 8; z-index: 4; border-left: 2px solid var(--acid-coral); padding-left: 1.3rem; }
.code-marginalia { position: absolute; z-index: 6; padding: .85rem 1rem; background: rgba(255,243,222,.92); color: var(--velvet-oxblood); border-radius: .95rem; font-size: .85rem; box-shadow: 0 0 36px rgba(8,3,10,.35); }
.m1 { left: 6vw; top: 15vh; transform: rotate(-8deg); }
.m2 { right: 9vw; bottom: 18vh; transform: rotate(6deg); }
.m3 { left: 39vw; bottom: 10vh; transform: rotate(-3deg); }
.palace::after { content: ""; position: absolute; left: 8vw; right: 8vw; bottom: 13vh; height: .4rem; background: repeating-linear-gradient(90deg, var(--mango-gold) 0 2rem, transparent 2rem 2.8rem, var(--electric-koi-cyan) 2.8rem 3.2rem, transparent 3.2rem 4rem); opacity: .75; }

.finale { min-height: 108vh; background: radial-gradient(circle at 50% 42%, rgba(255,243,222,.18), transparent 19rem), linear-gradient(180deg, var(--ink-night), var(--velvet-oxblood)); place-items: center; text-align: center; }
.final-moon { grid-column: 5 / 9; grid-row: 2 / 5; width: min(36vw, 24rem); aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle at 35% 30%, white, var(--moon-pearl) 58%, rgba(255,176,0,.86)); box-shadow: 0 0 100px rgba(255,243,222,.34); }
.finale .folio { grid-column: 5 / 9; grid-row: 5 / 6; }
.finale h2 { grid-column: 3 / 11; grid-row: 5 / 7; align-self: center; color: var(--moon-pearl); }
.terminal-line { grid-column: 4 / 10; grid-row: 7 / 8; padding: 1rem 1.4rem; background: rgba(8,3,10,.62); border: 1px solid rgba(36,246,232,.42); color: var(--electric-koi-cyan); box-shadow: 0 0 30px rgba(36,246,232,.14); }
.final-caption { grid-column: 4 / 10; grid-row: 8 / 9; margin: 0; }
.fish-shadow { position: absolute; left: 18vw; top: 50vh; width: 42vw; height: 10vh; border-radius: 50%; background: rgba(8,3,10,.42); filter: blur(18px); animation: shadowDrift 9s ease-in-out infinite; }
@keyframes shadowDrift { 50% { transform: translateX(26vw) scaleX(.72); opacity: .45; } }

.chapter.in-view .folio, .chapter.in-view h2, .chapter.in-view p, .chapter.in-view .lacquer-card, .chapter.in-view .code-marginalia, .chapter.in-view .terminal-line { animation: stampIn .9s var(--elastic) both; }
@keyframes stampIn { from { opacity: 0; transform: translateY(2rem) scale(.96); filter: blur(8px); } to { opacity: 1; transform: translateY(0) scale(1); filter: blur(0); } }

@media (max-width: 760px) {
  .chapter { grid-template-columns: repeat(6, 1fr); padding: 1.1rem; }
  .wordmark { grid-column: 1 / 7; font-size: clamp(4.4rem, 27vw, 9rem); writing-mode: vertical-rl; justify-self: start; letter-spacing: -.15em; }
  .hero-copy, .spread-left, .chapter-title-block, .palace-headline, .palace-text, .algorithm-caption, .terminal-line, .final-caption, .finale h2, .finale .folio { grid-column: 1 / 7; }
  .commit-note, .lacquer-card { grid-column: 1 / 6; }
  .folio-index { right: .5rem; transform: translateY(-50%) scale(.85); }
  .moon-phase { left: .6rem; top: .6rem; transform: scale(.82); }
  .glyph-orbit { width: 14rem; height: 14rem; right: 2rem; }
  .fish { max-width: 70vw; }
}