:root {
  --mist-field: #E7E9EE;
  --porcelain-shadow: #C4CAD3;
  --ink-gray: #222631;
  --murasaki-violet: #6F4AA8;
  --deep-plum: #2D183F;
  --moonlit-lavender: #B9A7E6;
  --aged-gold: #C9A45A;
  --paper-white: #F7F3EA;
  --sans: "Noto Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --display: "Afacad", "Noto Sans", system-ui, sans-serif;
  --serif: "Noto Serif JP", Georgia, serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink-gray);
  background: radial-gradient(circle at 18% 12%, rgba(185, 167, 230, 0.25), transparent 28rem), linear-gradient(135deg, var(--mist-field), var(--porcelain-shadow));
  font-family: var(--sans);
  overflow-x: hidden;
}

.mist-field {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background-image: linear-gradient(120deg, rgba(34, 38, 49, 0.045) 1px, transparent 1px), linear-gradient(30deg, rgba(34, 38, 49, 0.035) 1px, transparent 1px);
  background-size: 18rem 18rem, 22rem 22rem;
  background-position: 10vw 18vh, 46vw 8vh;
}

.field-glow {
  position: absolute;
  width: 38vw;
  height: 38vw;
  min-width: 24rem;
  min-height: 24rem;
  border-radius: 44% 56% 58% 42% / 45% 47% 53% 55%;
  background: rgba(111, 74, 168, 0.16);
  filter: blur(34px);
  animation: breathe 14s ease-in-out infinite;
}

.glow-one { left: -12vw; top: 22vh; }
.glow-two { right: -16vw; top: 72vh; animation-delay: -4s; background: rgba(185, 167, 230, 0.18); }
.glow-three { left: 40vw; top: 208vh; animation-delay: -8s; background: rgba(45, 24, 63, 0.10); }

.construction-line {
  position: absolute;
  height: 1px;
  width: 38rem;
  background: linear-gradient(90deg, transparent, rgba(34, 38, 49, 0.18), transparent);
  transform: rotate(-28deg);
}

.line-a { left: 7vw; top: 39vh; }
.line-b { right: 10vw; top: 162vh; transform: rotate(-30deg); }

.route-thread {
  position: absolute;
  left: 16vw;
  top: 28vh;
  width: min(68vw, 58rem);
  height: 220vh;
  opacity: 0.75;
  transform: skewY(-27deg);
  background: linear-gradient(180deg, transparent 0, transparent 4%, var(--aged-gold) 4.2%, transparent 4.5%, transparent 26%, var(--aged-gold) 26.2%, transparent 26.5%, transparent 52%, var(--aged-gold) 52.2%, transparent 52.5%, transparent 78%, var(--aged-gold) 78.2%, transparent 78.5%);
  mask-image: linear-gradient(180deg, #000 var(--thread-progress, 0%), transparent calc(var(--thread-progress, 0%) + 6%));
}

.site-seal {
  position: fixed;
  left: clamp(1.5rem, 4vw, 4rem);
  top: clamp(1.25rem, 3vw, 3rem);
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.58rem 0.9rem;
  border: 1px solid rgba(201, 164, 90, 0.55);
  border-radius: 999px;
  background: rgba(247, 243, 234, 0.58);
  color: var(--deep-plum);
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: lowercase;
  box-shadow: 0 1.4rem 3rem rgba(34, 38, 49, 0.08);
  backdrop-filter: blur(18px);
}

.seal-dot,
.gold-pin {
  width: 0.62rem;
  height: 0.62rem;
  border-radius: 50%;
  background: var(--aged-gold);
  box-shadow: 0 0 0 0.34rem rgba(201, 164, 90, 0.14), 0 0 1.1rem rgba(201, 164, 90, 0.8);
}

.quest-scroll {
  position: relative;
  z-index: 1;
}

.chamber {
  position: relative;
  min-height: 118vh;
  padding: 12vh clamp(1.4rem, 6vw, 7rem);
  isolation: isolate;
}

.focus-chamber .island,
.focus-chamber .pause-line,
.focus-chamber .archive-title,
.focus-chamber .final-inscription,
.focus-chamber .photo-plane {
  filter: blur(12px);
  opacity: 0.35;
  transform-origin: center;
  transition: filter 900ms ease, opacity 900ms ease, transform 1000ms cubic-bezier(.2,.8,.15,1);
}

.focus-chamber.in-focus .island,
.focus-chamber.in-focus .pause-line,
.focus-chamber.in-focus .archive-title,
.focus-chamber.in-focus .final-inscription,
.focus-chamber.in-focus .photo-plane {
  filter: blur(0);
  opacity: 1;
}

.chapter-mark {
  margin: 0 0 0.9rem;
  color: var(--murasaki-violet);
  font-family: var(--serif);
  font-size: clamp(0.95rem, 1.5vw, 1.25rem);
  font-weight: 700;
  letter-spacing: 0.18em;
}

h1,
h2 {
  margin: 0;
  color: var(--deep-plum);
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: 0.055em;
  line-height: 0.9;
  text-shadow: 0 1rem 2.8rem rgba(111, 74, 168, 0.16);
}

h1 { font-size: clamp(4rem, 11vw, 12rem); }
h2 { font-size: clamp(3rem, 8vw, 8rem); }

.opening-copy {
  position: absolute;
  left: clamp(1.5rem, 7vw, 8rem);
  top: 18vh;
  max-width: 52rem;
}

.invitation,
.final-inscription p:last-child,
.pause-line p {
  margin: 1.3rem 0 0;
  color: rgba(34, 38, 49, 0.76);
  font-size: clamp(1.1rem, 2vw, 1.65rem);
  line-height: 1.5;
}

.island {
  position: absolute;
  transform-style: preserve-3d;
}

.stair-island {
  right: 12vw;
  top: 43vh;
  width: 23rem;
  height: 22rem;
}

.iso-platform,
.iso-step,
.paper-slab,
.bridge-segment {
  position: absolute;
  transform: rotateZ(-45deg) skew(14deg, 14deg);
  box-shadow: 1.2rem 1.3rem 0 var(--deep-plum), 2rem 2.2rem 3.8rem rgba(34, 38, 49, 0.22);
}

.platform-top {
  left: 4rem;
  top: 7rem;
  width: 12rem;
  height: 8rem;
  background: linear-gradient(135deg, var(--moonlit-lavender), var(--murasaki-violet));
  border: 1px solid rgba(247, 243, 234, 0.65);
}

.iso-step {
  width: 7rem;
  height: 2.3rem;
  background: var(--paper-white);
  border: 1px solid rgba(196, 202, 211, 0.95);
}

.step-one { left: 1rem; top: 13rem; }
.step-two { left: 3.1rem; top: 15rem; }
.step-three { left: 5.2rem; top: 17rem; }

.photo-plane {
  position: absolute;
  overflow: hidden;
  transform: rotateZ(-45deg) skew(14deg, 14deg);
  box-shadow: inset 0 0 0 1px rgba(247, 243, 234, 0.36), 1rem 1rem 2.5rem rgba(34, 38, 49, 0.18);
}

.photo-plane::before {
  content: "";
  position: absolute;
  inset: -20%;
  background: radial-gradient(circle at 30% 30%, rgba(247, 243, 234, 0.65), transparent 18%), radial-gradient(circle at 65% 48%, rgba(185, 167, 230, 0.72), transparent 26%), radial-gradient(circle at 36% 72%, rgba(111, 74, 168, 0.68), transparent 30%), linear-gradient(135deg, #222631, #6F4AA8 48%, #C4CAD3);
  filter: saturate(0.84) blur(1.5px);
  animation: photoFocus 9s ease-in-out infinite;
}

.silk-plane {
  right: 1.3rem;
  top: 4rem;
  width: 8.5rem;
  height: 5.4rem;
  border-radius: 0.45rem;
}

.ink-blob {
  position: absolute;
  border-radius: 54% 46% 64% 36% / 46% 42% 58% 54%;
  background: radial-gradient(circle at 34% 28%, rgba(185, 167, 230, 0.82), rgba(111, 74, 168, 0.58) 45%, rgba(45, 24, 63, 0.18));
  filter: blur(8px);
  mix-blend-mode: multiply;
  animation: inkBreath 12s ease-in-out infinite;
}

.blob-stair { left: 0; top: 5.6rem; width: 11rem; height: 8rem; }
.pin-one { position: absolute; right: 3rem; top: 2.4rem; z-index: 3; }

.chamber-garden {
  min-height: 140vh;
}

.garden-island {
  left: 10vw;
  top: 17vh;
  width: min(74vw, 58rem);
  height: 42rem;
}

.garden-floor {
  left: 15rem;
  top: 10rem;
  width: 21rem;
  height: 15rem;
  background: linear-gradient(135deg, var(--paper-white), var(--porcelain-shadow));
  border: 1px solid rgba(201, 164, 90, 0.32);
}

.moon-gate {
  position: absolute;
  left: 25rem;
  top: 3rem;
  width: 10rem;
  height: 10rem;
  border: 1.3rem solid var(--deep-plum);
  border-bottom-color: transparent;
  border-radius: 50% 50% 0 0;
  transform: rotateZ(-14deg) skewY(8deg);
  box-shadow: 1rem 1.6rem 2rem rgba(34, 38, 49, 0.18);
}

.moon-gate span {
  position: absolute;
  inset: 1.2rem;
  border-radius: inherit;
  background: linear-gradient(180deg, rgba(185, 167, 230, 0.36), transparent);
}

.stone-plane {
  left: 17rem;
  top: 13rem;
  width: 14rem;
  height: 8rem;
}

.stepping-plaque {
  position: absolute;
  width: 14rem;
  padding: 1rem 1.1rem;
  background: rgba(247, 243, 234, 0.78);
  border: 1px solid rgba(196, 202, 211, 0.82);
  box-shadow: 0.7rem 0.9rem 0 rgba(196, 202, 211, 0.55), 1.4rem 1.7rem 3rem rgba(34, 38, 49, 0.12);
  transform: rotateZ(-9deg);
  backdrop-filter: blur(16px);
}

.stepping-plaque span {
  display: block;
  color: var(--murasaki-violet);
  font-family: var(--serif);
  font-size: 0.82rem;
  letter-spacing: 0.07em;
}

.stepping-plaque strong {
  display: block;
  margin-top: 0.45rem;
  color: var(--ink-gray);
  font-size: 0.96rem;
  font-weight: 500;
  line-height: 1.35;
}

.plaque-a { left: 2rem; top: 12rem; }
.plaque-b { left: 28rem; top: 25rem; }
.plaque-c { left: 42rem; top: 7rem; }
.pin-two { position: absolute; left: 35rem; top: 10rem; z-index: 3; }
.blob-garden { left: 31rem; top: 15rem; width: 17rem; height: 12rem; animation-delay: -4s; }

.chamber-pause {
  min-height: 116vh;
}

.pause-line {
  position: absolute;
  left: 24vw;
  top: 38vh;
  max-width: 42rem;
}

.pause-line p {
  color: var(--deep-plum);
  font-family: var(--serif);
  font-size: clamp(1.6rem, 4vw, 4.5rem);
  line-height: 1.18;
}

.blob-pause {
  left: 10vw;
  top: 26vh;
  width: 34vw;
  height: 24vw;
  opacity: 0.62;
}

.petal-mask {
  right: 12vw;
  top: 52vh;
  width: 13rem;
  height: 20rem;
  border-radius: 45% 55% 52% 48%;
  transform: rotateZ(12deg);
}

.chamber-archive {
  min-height: 142vh;
}

.archive-title {
  position: absolute;
  right: 9vw;
  top: 15vh;
  text-align: right;
}

.archive-island {
  left: 12vw;
  top: 31vh;
  width: 48rem;
  height: 42rem;
}

.paper-slab {
  left: 12rem;
  width: 22rem;
  height: 7rem;
  padding: 2rem;
  background: linear-gradient(135deg, var(--paper-white), var(--mist-field));
  border: 1px solid rgba(196, 202, 211, 0.95);
}

.paper-slab span {
  display: block;
  color: var(--deep-plum);
  font-family: var(--serif);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  transform: skew(-14deg, -14deg) rotateZ(45deg);
}

.slab-one { top: 5rem; }
.slab-two { top: 12rem; left: 14rem; background: linear-gradient(135deg, var(--moonlit-lavender), var(--paper-white)); }
.slab-three { top: 19rem; left: 16rem; background: linear-gradient(135deg, var(--murasaki-violet), var(--deep-plum)); }
.slab-three span { color: var(--paper-white); }

.lacquer-window,
.lantern-window {
  width: 8rem;
  height: 5rem;
  z-index: 2;
}

.lacquer-window { left: 27rem; top: 9rem; }
.lantern-window { left: 10rem; top: 22rem; }
.pin-three { position: absolute; left: 35rem; top: 18rem; z-index: 4; }
.blob-archive { left: 4rem; top: 15rem; width: 22rem; height: 15rem; animation-delay: -7s; }

.chamber-finale {
  min-height: 124vh;
}

.bridge-island {
  left: 10vw;
  top: 23vh;
  width: 55rem;
  height: 28rem;
}

.bridge-segment {
  width: 13rem;
  height: 5rem;
  background: linear-gradient(135deg, var(--moonlit-lavender), var(--murasaki-violet));
  border: 1px solid rgba(247, 243, 234, 0.55);
}

.segment-one { left: 1rem; top: 12rem; }
.segment-two { left: 14rem; top: 12rem; background: linear-gradient(135deg, var(--paper-white), var(--moonlit-lavender)); }
.segment-three { left: 27rem; top: 12rem; background: linear-gradient(135deg, var(--murasaki-violet), var(--deep-plum)); }

.gate-ring {
  position: absolute;
  left: 34rem;
  top: 2rem;
  width: 13rem;
  height: 13rem;
  border: 1.1rem solid rgba(45, 24, 63, 0.92);
  border-radius: 50%;
  box-shadow: 1rem 1.6rem 2.5rem rgba(34, 38, 49, 0.2), inset 0 0 0 1px rgba(201, 164, 90, 0.5);
}

.pin-four { position: absolute; left: 41rem; top: 17rem; z-index: 3; }
.blob-bridge { left: 24rem; top: 7rem; width: 20rem; height: 13rem; }

.final-inscription {
  position: absolute;
  right: 8vw;
  bottom: 18vh;
  max-width: 52rem;
  text-align: right;
}

.room-index {
  position: fixed;
  right: clamp(1rem, 3vw, 3rem);
  top: 50%;
  z-index: 6;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transform: translateY(-50%);
}

.room-dot {
  position: relative;
  width: 0.9rem;
  height: 0.9rem;
  border: 1px solid rgba(45, 24, 63, 0.28);
  border-radius: 50%;
  background: rgba(247, 243, 234, 0.56);
  cursor: pointer;
  transition: background 300ms ease, box-shadow 300ms ease, transform 300ms ease;
}

.room-dot span {
  position: absolute;
  right: 1.4rem;
  top: 50%;
  color: var(--deep-plum);
  font-family: var(--display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  opacity: 0;
  transform: translateY(-50%) translateX(0.4rem);
  transition: opacity 300ms ease, transform 300ms ease;
}

.room-dot.active,
.room-dot:hover {
  background: var(--aged-gold);
  box-shadow: 0 0 0 0.45rem rgba(201, 164, 90, 0.16), 0 0 1.4rem rgba(201, 164, 90, 0.7);
  transform: scale(1.18);
}

.room-dot.active span,
.room-dot:hover span {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

.sealed-awake .gold-pin,
.gold-pin.active {
  animation: pinPulse 900ms ease;
}

@keyframes breathe {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); border-radius: 54% 46% 64% 36% / 46% 42% 58% 54%; }
  50% { transform: translate3d(3vw, -2vh, 0) scale(1.08); border-radius: 42% 58% 38% 62% / 60% 35% 65% 40%; }
}

@keyframes inkBreath {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(1.2rem, -0.9rem, 0) scale(1.07) rotate(5deg); }
}

@keyframes photoFocus {
  0%, 100% { filter: saturate(0.72) blur(4px); transform: scale(1.04); }
  50% { filter: saturate(0.95) blur(0.4px); transform: scale(1); }
}

@keyframes pinPulse {
  0% { box-shadow: 0 0 0 0 rgba(201, 164, 90, 0.45), 0 0 1rem rgba(201, 164, 90, 0.8); }
  100% { box-shadow: 0 0 0 1.3rem rgba(201, 164, 90, 0), 0 0 1rem rgba(201, 164, 90, 0.8); }
}

@media (max-width: 900px) {
  .chamber { min-height: 110vh; padding-inline: 1.2rem; }
  .site-seal { font-size: 0.84rem; }
  .opening-copy { top: 16vh; }
  .stair-island { right: -2rem; top: 55vh; transform: scale(0.74); }
  .garden-island { left: -8rem; top: 22vh; transform: scale(0.68); }
  .plaque-c { left: 35rem; }
  .pause-line { left: 1.5rem; right: 1.5rem; top: 35vh; }
  .archive-title { left: 1.3rem; right: auto; text-align: left; }
  .archive-island { left: -8rem; top: 40vh; transform: scale(0.68); }
  .bridge-island { left: -11rem; transform: scale(0.68); }
  .final-inscription { left: 1.3rem; right: 1.3rem; text-align: left; }
  .room-index { display: none; }
}