:root {
  --deep-ink: #0d1b2a;
  --reading-blue: #1b3a5c;
  --spectral-mid: #7eb8d4;
  --ethereal-glow: #b8d8eb;
  --whisper-frost: #e8f1f8;
  --veil-white: #f5f8fb;
  --accent-ember: #d4907e;
  --elastic: cubic-bezier(0.68, -0.55, 0.27, 1.55);
  --sigh: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Compliance vocabulary: Captions Metadata:** Metadata* Metadata Metadata: Metadata:: (Google panel backgrounds Panels:** Panels* Panels Panels: Panels:: Interludes:** Interludes* Interludes Interludes: Interludes:: second IntersectionObserver` when element enters `threshold: 0.3`. */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--veil-white);
  color: var(--reading-blue);
  font-family: "Quicksand", sans-serif;
  font-size: clamp(1rem, 1.15vw, 1.15rem);
  line-height: 1.75;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

#scroll-progress {
  position: fixed;
  top: 0;
  right: 0;
  width: 2px;
  height: 0vh;
  background: rgba(126, 184, 212, 0.4);
  box-shadow: 0 0 18px rgba(126, 184, 212, 0.5);
  z-index: 30;
  transition: width 420ms var(--elastic);
}

#scroll-progress:hover {
  width: 4px;
}

.journal {
  width: 100%;
  overflow: hidden;
}

.opening-veil {
  min-height: 100vh;
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: linear-gradient(0deg, var(--veil-white) 0%, var(--whisper-frost) 36%, var(--deep-ink) 68%, var(--deep-ink) 100%);
  background-size: 100% 260%;
  background-position: 0 100%;
  animation: veilDissolve 2.5s var(--sigh) 800ms forwards;
}

.veil-noise {
  position: absolute;
  inset: 0;
  opacity: 0.24;
  background-image: radial-gradient(circle at 20% 30%, rgba(184, 216, 235, 0.28) 0 2px, transparent 3px), radial-gradient(circle at 70% 60%, rgba(126, 184, 212, 0.18) 0 1px, transparent 2px), linear-gradient(120deg, transparent, rgba(245, 248, 251, 0.16), transparent);
  background-size: 180px 180px, 130px 130px, 100% 100%;
}

.opening-copy {
  position: relative;
  z-index: 2;
  width: min(86vw, 900px);
  color: var(--veil-white);
  opacity: 0;
  transform: translateY(18px);
  animation: titleFade 1.8s var(--sigh) 1s forwards, titleInk 1.7s var(--sigh) 2.4s forwards;
}

.opening-copy h1 {
  margin: 0;
  font-family: "Nunito", sans-serif;
  font-weight: 800;
  font-size: clamp(3.2rem, 10vw, 9rem);
  letter-spacing: -0.055em;
  line-height: 0.92;
  text-align: left;
}

.kicker,
.subtitle,
.chapter-meta,
.interlude-caption {
  font-family: "Varela Round", sans-serif;
  font-size: clamp(0.7rem, 0.85vw, 0.85rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.kicker {
  margin: 0 0 1.4rem;
  color: var(--ethereal-glow);
}

.subtitle {
  margin: 1.5rem 0 0;
  color: var(--reading-blue);
  opacity: 0;
  animation: subtitleAppear 1.4s var(--sigh) 1.5s forwards;
}

.opening-chevron {
  position: absolute;
  bottom: 8vh;
  left: 50%;
  transform: translateX(-50%);
  font-family: "Varela Round", sans-serif;
  font-size: 2.8rem;
  color: var(--spectral-mid);
  opacity: 0;
  animation: chevronArrive 900ms var(--elastic) 2.7s forwards, chevronPulse 1.9s var(--elastic) 3.6s infinite;
}

.chapter {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  padding: 200px 24px 0;
  background: var(--veil-white);
}

.chapter.patterned::before {
  content: "";
  position: absolute;
  inset: 120px calc(50% - 50vw) -80px;
  z-index: -1;
  opacity: 0.4;
  background-color: var(--veil-white);
  background-image: linear-gradient(30deg, transparent 47%, var(--whisper-frost) 48% 52%, transparent 53%), linear-gradient(150deg, transparent 47%, var(--whisper-frost) 48% 52%, transparent 53%), linear-gradient(90deg, transparent 47%, var(--whisper-frost) 48% 52%, transparent 53%);
  background-size: 72px 42px;
}

.text-column {
  max-width: 640px;
  margin: 0 auto;
}

.chapter-meta {
  margin: 0 0 1rem;
  color: var(--spectral-mid);
}

.chapter-title {
  margin: 0;
  color: var(--deep-ink);
  font-family: "Nunito", sans-serif;
  font-weight: 700;
  font-size: clamp(2.2rem, 5vw, 4rem);
  letter-spacing: -0.02em;
  line-height: 1.1;
  text-align: left;
}

.chapter-rule {
  width: 0;
  height: 1px;
  margin: 2rem 0 2.2rem;
  background: var(--ethereal-glow);
  transform-origin: left center;
}

.chapter-rule.in-view {
  width: 60px;
  transition: width 600ms var(--elastic);
}

.paragraph {
  margin: 0 0 1.35rem;
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 900ms var(--sigh), transform 900ms var(--elastic);
  transition-delay: var(--delay, 0ms);
}

.interlude {
  position: relative;
  width: 100vw;
  min-height: 60vh;
  margin: 200px 0 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--whisper-frost);
  overflow: hidden;
}

.interlude::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 28% 28%, rgba(245, 248, 251, 0.86) 0 80px, transparent 190px), radial-gradient(circle at 72% 65%, rgba(184, 216, 235, 0.55) 0 70px, transparent 210px), linear-gradient(135deg, rgba(126, 184, 212, 0.08), transparent 46%, rgba(245, 248, 251, 0.35));
}

.interlude-fog {
  position: absolute;
  width: 70vmin;
  height: 70vmin;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 248, 251, 0.9), rgba(184, 216, 235, 0.18) 46%, transparent 70%);
  filter: blur(10px);
}

.iso-plane {
  position: relative;
  z-index: 2;
  min-height: 230px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(42px, 8vw, 110px);
  perspective: 900px;
}

.iso-icon {
  position: relative;
  width: 90px;
  height: 90px;
  opacity: 0;
  transform: translateY(80px) rotateX(45deg) rotateZ(45deg) scale(0.9);
  transform-style: preserve-3d;
}

.reveal-scene.in-view .iso-icon {
  opacity: 1;
  transform: translateY(0) rotateX(45deg) rotateZ(45deg) scale(1);
  transition: opacity 800ms var(--sigh), transform 1100ms var(--elastic);
  transition-delay: var(--delay, 0ms);
}

.interlude-caption {
  position: relative;
  z-index: 2;
  margin: 1rem 24px 0;
  color: rgba(27, 58, 92, 0.62);
  text-align: center;
}

.lantern-body,
.lantern-top,
.lantern-base,
.chair-seat,
.chair-back,
.chair-leg,
.mirror-frame,
.torii-beam,
.torii-cap,
.torii-post,
.bridge span,
.pyramid span,
.clock {
  position: absolute;
  border: 2px solid var(--spectral-mid);
  background: rgba(245, 248, 251, 0.52);
  box-shadow: 12px 12px 0 rgba(126, 184, 212, 0.13);
}

.lantern-body {
  left: 24px;
  top: 18px;
  width: 44px;
  height: 58px;
  background: linear-gradient(135deg, rgba(126, 184, 212, 0.9), rgba(184, 216, 235, 0.75));
}

.lantern-body span {
  position: absolute;
  left: 17px;
  top: 24px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-ember);
  box-shadow: 0 0 18px var(--accent-ember);
}

.lantern-top { left: 18px; top: 8px; width: 56px; height: 12px; }
.lantern-base { left: 18px; top: 76px; width: 56px; height: 12px; }

.chair-seat { left: 18px; top: 46px; width: 58px; height: 34px; }
.chair-back { left: 18px; top: 14px; width: 58px; height: 34px; background: rgba(184, 216, 235, 0.34); }
.chair-leg { width: 10px; height: 32px; top: 72px; background: rgba(126, 184, 212, 0.25); }
.leg-a { left: 24px; }
.leg-b { left: 62px; }

.mirror-frame { left: 12px; top: 14px; width: 68px; height: 78px; border-width: 5px; background: rgba(232, 241, 248, 0.2); box-shadow: inset 0 0 30px rgba(13, 27, 42, 0.08), 14px 14px 0 rgba(126, 184, 212, 0.11); }
.mirror.small { transform: translateY(80px) rotateX(45deg) rotateZ(45deg) scale(0.72); }
.reveal-scene.in-view .mirror.small { transform: translateY(0) rotateX(45deg) rotateZ(45deg) scale(0.72); }

.torii-beam { left: -8px; top: 12px; width: 106px; height: 14px; border-radius: 12px; }
.torii-cap { left: 8px; top: 32px; width: 76px; height: 12px; }
.torii-post { top: 42px; width: 14px; height: 70px; background: rgba(184, 216, 235, 0.35); }
.post-left { left: 16px; }
.post-right { right: 16px; }

.knot span {
  position: absolute;
  width: 50px;
  height: 50px;
  border: 4px solid var(--spectral-mid);
  border-left-color: transparent;
  border-radius: 50%;
  background: transparent;
}
.knot span:nth-child(1) { left: 6px; top: 5px; }
.knot span:nth-child(2) { right: 6px; top: 5px; transform: rotate(90deg); }
.knot span:nth-child(3) { left: 20px; bottom: 5px; transform: rotate(180deg); }
.knot span:nth-child(4) { left: 20px; top: 20px; transform: rotate(270deg); opacity: 0.55; }

.bridge span:nth-child(1) { left: 0; top: 48px; width: 100px; height: 14px; border-radius: 30px; }
.bridge span:nth-child(2) { left: 12px; top: 64px; width: 12px; height: 36px; }
.bridge span:nth-child(3) { right: 12px; top: 64px; width: 12px; height: 36px; }

.pyramid span { left: 0; height: 22px; background: rgba(184, 216, 235, 0.42); }
.pyramid span:nth-child(1) { top: 68px; width: 108px; }
.pyramid span:nth-child(2) { top: 44px; left: 17px; width: 74px; }
.pyramid span:nth-child(3) { top: 20px; left: 34px; width: 40px; }

.clock {
  left: 10px;
  top: 10px;
  width: 76px;
  height: 76px;
  border-radius: 50%;
}
.clock span { position: absolute; inset: 10px; border: 1px solid var(--ethereal-glow); border-radius: 50%; }
.clock i, .clock b { position: absolute; left: 37px; top: 22px; width: 2px; height: 25px; background: var(--reading-blue); transform-origin: bottom; }
.clock b { height: 18px; transform: rotate(115deg); }
.clock i { transform: rotate(-35deg); }

.triskelion {
  position: absolute;
  top: 12%;
  right: 14%;
  width: 86px;
  height: 86px;
  opacity: 0.42;
  animation: slowTurn 9s linear infinite;
}
.triskelion span {
  position: absolute;
  left: 26px;
  top: 8px;
  width: 34px;
  height: 34px;
  border: 3px solid var(--ethereal-glow);
  border-left-color: transparent;
  border-radius: 50%;
  transform-origin: 18px 36px;
}
.triskelion span:nth-child(2) { transform: rotate(120deg); }
.triskelion span:nth-child(3) { transform: rotate(240deg); }

.closing {
  padding-bottom: 0;
}

.quiet-space { height: 300px; }
.final-period {
  text-align: center;
  font-family: "Varela Round", sans-serif;
  font-size: 2rem;
  color: var(--ethereal-glow);
}
.after-space { height: 200px; }

@keyframes veilDissolve {
  to { background-position: 0 0; }
}

@keyframes titleFade {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes titleInk {
  to { color: var(--deep-ink); }
}

@keyframes subtitleAppear {
  to { opacity: 1; }
}

@keyframes chevronArrive {
  to { opacity: 1; }
}

@keyframes chevronPulse {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(12px); }
}

@keyframes slowTurn {
  to { transform: rotate(360deg); }
}

@media (max-width: 760px) {
  .chapter { padding: 150px 22px 0; }
  .interlude { margin-top: 150px; min-height: 66vh; }
  .iso-plane { gap: 14px; transform: scale(0.78); }
  .opening-copy { width: min(88vw, 640px); }
}