:root {
  --murasaki-ink: #3B174F;
  --wisteria-smoke: #8B6BB3;
  --moon-paper: #F3E7D3;
  --heian-gold: #C8A24A;
  --plum-shadow: #1A1024;
  --safflower-red: #B8425A;
  --mica-lavender: #D9C7F2;
  --font-mincho: "Shippori Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --font-cormorant: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --font-brush: "Zen Kurenaido", "Hiragino Sans", cursive;
  --font-interface: "Noto Sans JP", Inter, system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--plum-shadow);
  color: var(--moon-paper);
}

body {
  font-family: var(--font-cormorant);
  cursor: none;
}

button { font: inherit; }

.mica-field {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 5;
  opacity: .44;
  mix-blend-mode: screen;
  background-image:
    radial-gradient(circle at 13% 22%, rgba(217, 199, 242, .18) 0 1px, transparent 2px),
    radial-gradient(circle at 62% 71%, rgba(200, 162, 74, .2) 0 1px, transparent 2px),
    radial-gradient(circle at 42% 39%, rgba(243, 231, 211, .08) 0 1px, transparent 2px);
  background-size: 73px 83px, 127px 101px, 41px 59px;
  animation: micaDrift 18s linear infinite;
}

.lantern {
  position: fixed;
  left: var(--lantern-x, 50vw);
  top: var(--lantern-y, 50vh);
  width: 220px;
  height: 220px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  z-index: 4;
  pointer-events: none;
  background: radial-gradient(circle, rgba(243, 231, 211, .22), rgba(217, 199, 242, .09) 35%, transparent 68%);
  mix-blend-mode: screen;
}

.scroll-manuscript {
  display: flex;
  height: 100vh;
  width: 600vw;
  transform: translate3d(calc(var(--progress, 0) * -500vw), 0, 0);
  transition: transform 900ms cubic-bezier(.65, .04, .18, 1);
}

.chamber {
  position: relative;
  width: 100vw;
  height: 100vh;
  flex: 0 0 100vw;
  overflow: hidden;
  padding: clamp(32px, 6vw, 90px);
  background:
    radial-gradient(circle at 74% 23%, rgba(217, 199, 242, .16), transparent 26%),
    radial-gradient(circle at 22% 72%, rgba(139, 107, 179, .22), transparent 33%),
    linear-gradient(115deg, var(--plum-shadow), var(--murasaki-ink) 48%, #24102f);
}

.chamber::before {
  content: "";
  position: absolute;
  inset: 5vh 8vw;
  border-left: 1px solid rgba(200, 162, 74, .28);
  border-right: 1px solid rgba(200, 162, 74, .16);
  background: linear-gradient(90deg, transparent 0 23%, rgba(243, 231, 211, .05) 24% 25%, transparent 26% 49%, rgba(200, 162, 74, .08) 50% 50.4%, transparent 51%);
  transform: skewX(-6deg);
  pointer-events: none;
}

.purple-thread {
  position: absolute;
  left: 0;
  top: 0;
  width: 600vw;
  height: 100vh;
  z-index: 2;
  pointer-events: none;
}

.purple-thread path {
  fill: none;
  stroke: url(#none);
  stroke: var(--heian-gold);
  stroke-width: 4;
  stroke-linecap: round;
  filter: drop-shadow(0 0 10px rgba(217, 199, 242, .65));
  stroke-dasharray: var(--thread-length, 7600);
  stroke-dashoffset: calc(var(--thread-length, 7600) * (1 - var(--thread-draw, .08)));
}

h1, h2 {
  margin: 0;
  font-family: var(--font-mincho);
  font-weight: 400;
  letter-spacing: .08em;
}

h1 { font-size: clamp(2.3rem, 6vw, 7rem); }
h2 { font-size: clamp(2.1rem, 5.4vw, 6.4rem); writing-mode: vertical-rl; line-height: 1.1; }
p { font-size: clamp(1.2rem, 2vw, 2rem); line-height: 1.5; }

.clue-label {
  margin: 0 0 1rem;
  font-family: var(--font-brush);
  font-size: .9rem;
  color: var(--heian-gold);
  letter-spacing: .18em;
  text-transform: lowercase;
}

.domain-slip {
  position: absolute;
  left: 11vw;
  top: 29vh;
  width: min(720px, 72vw);
  padding: clamp(28px, 5vw, 72px);
  color: var(--murasaki-ink);
  background:
    radial-gradient(circle at 20% 12%, rgba(200, 162, 74, .22), transparent 18%),
    linear-gradient(96deg, rgba(243, 231, 211, .96), rgba(217, 199, 242, .88));
  clip-path: polygon(3% 2%, 96% 0, 100% 89%, 92% 100%, 0 96%);
  transform: perspective(900px) rotateY(calc(-18deg + var(--progress, 0) * 35deg)) rotateZ(-2deg);
  box-shadow: 0 26px 90px rgba(0, 0, 0, .38);
  z-index: 3;
}

.domain-slip em { color: var(--safflower-red); font-size: 1.35rem; }

.gate-lines span {
  position: absolute;
  background: var(--heian-gold);
  box-shadow: 0 0 18px rgba(200, 162, 74, .55);
  transform-origin: left top;
  opacity: .82;
}
.gate-lines span:nth-child(1) { left: 8vw; top: 20vh; width: 48vw; height: 2px; animation: drawWidth 2.4s both; }
.gate-lines span:nth-child(2) { left: 8vw; top: 20vh; width: 2px; height: 58vh; animation: drawHeight 2.4s .25s both; }
.gate-lines span:nth-child(3) { left: 56vw; top: 20vh; width: 2px; height: 58vh; animation: drawHeight 2.4s .5s both; }
.gate-lines span:nth-child(4) { left: 8vw; top: 78vh; width: 48vw; height: 2px; animation: drawWidth 2.4s .75s both; }

.ink-bloom {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 64% 49%, rgba(59, 23, 79, .1), rgba(26, 16, 36, .9) 36%, transparent 62%);
  animation: bloom 9s ease-in-out infinite alternate;
}

.vertical-note {
  position: absolute;
  right: 15vw;
  top: 18vh;
  writing-mode: vertical-rl;
  font-family: var(--font-mincho);
  color: var(--mica-lavender);
  font-size: clamp(2rem, 5vw, 5.5rem);
  opacity: .55;
}

.brush-stone {
  position: absolute;
  right: 22vw;
  bottom: 13vh;
  width: 160px;
  height: 80px;
  border-radius: 45% 55% 40% 50%;
  background: radial-gradient(circle at 35% 30%, #3B174F, #1A1024 68%);
  border: 1px solid rgba(217, 199, 242, .18);
}

.screen-set { position: absolute; inset: 10vh 4vw; display: flex; perspective: 1200px; }
.screen-panel {
  flex: 1;
  border-left: 1px solid rgba(200, 162, 74, .55);
  background:
    linear-gradient(100deg, rgba(243, 231, 211, .08), rgba(139, 107, 179, .2)),
    repeating-linear-gradient(90deg, transparent 0 38px, rgba(200, 162, 74, .08) 39px 40px);
  transform: rotateY(var(--fold, 0deg));
  transition: transform 1.2s ease;
}
.panel-a { --fold: 12deg; } .panel-b { --fold: -10deg; } .panel-c { --fold: 9deg; } .panel-d { --fold: -14deg; }
.active .screen-panel { transform: rotateY(calc(var(--fold) * -1)); }

.ribbon-text, .moon-ledger, .bridge-prose, .garden-fragment, .final-scroll {
  position: relative;
  z-index: 3;
  max-width: 760px;
  padding: 34px 42px;
  background: linear-gradient(100deg, rgba(243, 231, 211, .9), rgba(217, 199, 242, .72));
  color: var(--murasaki-ink);
  clip-path: polygon(0 5%, 94% 0, 100% 92%, 8% 100%);
  box-shadow: 0 28px 100px rgba(0, 0, 0, .28);
}

.ribbon-text { margin: 12vh 0 0 44vw; }
.paper-knot {
  position: absolute;
  left: 20vw;
  bottom: 18vh;
  z-index: 3;
  color: var(--moon-paper);
  background: transparent;
  border: 1px solid var(--heian-gold);
  padding: 18px 36px;
  border-radius: 50% 35% 50% 35%;
  transform: rotate(-12deg);
}
.silhouette { position: absolute; right: 18vw; bottom: 8vh; width: 180px; height: 460px; background: rgba(26,16,36,.42); filter: blur(12px); border-radius: 48% 52% 0 0; }

.moon-bookmark {
  position: absolute;
  right: 18vw;
  top: 12vh;
  width: 330px;
  height: 330px;
  border-radius: 50%;
  background: var(--moon-paper);
  box-shadow: 0 0 80px rgba(217, 199, 242, .65);
}
.moon-bookmark::after { content: ""; position: absolute; inset: -10px 70px 40px -36px; border-radius: 50%; background: var(--murasaki-ink); }
.moon-ledger { margin: 23vh 0 0 11vw; }
.genji-emblems { position: absolute; left: 55vw; bottom: 16vh; display: flex; gap: 28px; z-index: 3; }
.emblem, .shell {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  border: 1px solid rgba(200,162,74,.8);
  background: radial-gradient(circle, rgba(243,231,211,.92), rgba(217,199,242,.55));
  color: var(--murasaki-ink);
  font-family: var(--font-mincho);
  font-size: 2rem;
}
.cart-wheel { position: absolute; right: 11vw; bottom: 10vh; width: 220px; height: 220px; border: 8px double var(--heian-gold); border-radius: 50%; opacity: .5; animation: wheel 20s linear infinite; }
.cart-wheel::before, .cart-wheel::after { content: ""; position: absolute; left: 50%; top: 0; width: 2px; height: 100%; background: var(--heian-gold); }
.cart-wheel::after { transform: rotate(90deg); }

.bridge-prose { margin: 13vh 0 0 58vw; max-width: 520px; }
.bridge-prose p:last-child span { display: block; font-style: italic; }
.poem-slips { position: absolute; left: 10vw; top: 9vh; display: flex; gap: 42px; z-index: 3; }
.waka-slip {
  width: 118px;
  min-height: 520px;
  padding: 30px 18px;
  writing-mode: vertical-rl;
  font-family: var(--font-mincho);
  font-size: 1.6rem;
  color: var(--murasaki-ink);
  background: linear-gradient(#F3E7D3, #D9C7F2);
  border: 0;
  clip-path: polygon(8% 0, 100% 3%, 92% 100%, 0 96%);
  box-shadow: 0 20px 70px rgba(0,0,0,.32);
  animation: slipFloat 6s ease-in-out infinite;
}
.waka-slip:nth-child(2) { animation-delay: -2s; margin-top: 9vh; }
.waka-slip:nth-child(3) { animation-delay: -4s; margin-top: 3vh; }
.incense-smoke span { position: absolute; bottom: 13vh; left: 48vw; width: 18px; height: 260px; border-radius: 50%; border-left: 2px solid rgba(217,199,242,.35); filter: blur(2px); animation: smoke 8s ease-in-out infinite; }
.incense-smoke span:nth-child(2) { left: 51vw; animation-delay: -3s; } .incense-smoke span:nth-child(3) { left: 54vw; animation-delay: -5s; }

.wisteria-vines i { position: absolute; top: -3vh; width: 2px; height: 58vh; background: linear-gradient(var(--heian-gold), transparent); transform-origin: top; animation: vine 7s ease-in-out infinite; }
.wisteria-vines i::after { content: ""; position: absolute; left: -18px; top: 55%; width: 38px; height: 90px; border-radius: 50%; background: radial-gradient(circle, rgba(217,199,242,.62), transparent 68%); }
.wisteria-vines i:nth-child(1) { left: 18vw; } .wisteria-vines i:nth-child(2) { left: 34vw; animation-delay: -1s; } .wisteria-vines i:nth-child(3) { left: 49vw; animation-delay: -2s; } .wisteria-vines i:nth-child(4) { left: 69vw; animation-delay: -3s; } .wisteria-vines i:nth-child(5) { left: 84vw; animation-delay: -4s; }
.garden-fragment { margin: 26vh 0 0 13vw; }
.shell-game { position: absolute; right: 12vw; bottom: 18vh; display: flex; gap: 34px; z-index: 3; }
.shell { border-radius: 50% 50% 42% 58%; font-size: 0; }
.shell::before { content: "貝"; font-size: 2.1rem; }
.hidden-name { position: absolute; left: 57vw; top: 34vh; color: var(--mica-lavender); font-family: var(--font-mincho); font-size: clamp(4rem, 10vw, 12rem); opacity: 0; filter: blur(14px); transition: opacity .4s, filter .7s; z-index: 3; }
.hidden-name.visible { opacity: .92; filter: blur(0); }

.purple-room { background: radial-gradient(circle at 50% 52%, rgba(139,107,179,.42), transparent 34%), linear-gradient(115deg, #1A1024, #3B174F 60%, #1A1024); }
.room-veil { position: absolute; inset: 9vh 9vw; border: 1px solid rgba(200,162,74,.38); background: radial-gradient(circle, rgba(217,199,242,.09), transparent 65%); transform: perspective(800px) rotateY(-10deg); }
.final-scroll { margin: 17vh auto 0; text-align: left; max-width: 860px; }
.stamp-button {
  background: var(--safflower-red);
  color: var(--moon-paper);
  border: 0;
  padding: 16px 28px;
  font-family: var(--font-brush);
  border-radius: 2px;
  box-shadow: 0 10px 0 rgba(59,23,79,.26);
}
.red-stamp { position: absolute; right: 22vw; bottom: 18vh; width: 150px; height: 150px; display: grid; place-items: center; font-family: var(--font-mincho); font-size: 5rem; color: var(--moon-paper); background: var(--safflower-red); opacity: 0; transform: scale(2.2) rotate(-14deg); transition: transform .35s cubic-bezier(.2,1.4,.42,1), opacity .2s; mix-blend-mode: multiply; z-index: 4; }
.red-stamp.stamped { opacity: .92; transform: scale(1) rotate(-7deg); }
.constellation span { position: absolute; width: 5px; height: 5px; border-radius: 50%; background: var(--heian-gold); box-shadow: 0 0 16px var(--heian-gold); }
.constellation span:nth-child(1) { left: 24vw; top: 24vh; } .constellation span:nth-child(2) { left: 73vw; top: 22vh; } .constellation span:nth-child(3) { left: 66vw; top: 68vh; } .constellation span:nth-child(4) { left: 30vw; top: 78vh; } .constellation span:nth-child(5) { left: 47vw; top: 15vh; }

.chapter-seals {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  gap: 12px;
}
.seal {
  width: 54px;
  height: 54px;
  border-radius: 40% 48% 42% 45%;
  border: 1px solid rgba(200, 162, 74, .65);
  color: var(--moon-paper);
  background: rgba(184, 66, 90, .6);
  font-family: var(--font-mincho);
  position: relative;
}
.seal small { position: absolute; bottom: 62px; left: 50%; transform: translateX(-50%); white-space: nowrap; opacity: 0; font-family: var(--font-interface); font-size: .68rem; color: var(--moon-paper); }
.seal:hover small, .seal.active small { opacity: 1; }
.seal.active { background: var(--safflower-red); box-shadow: 0 0 22px rgba(184,66,90,.8); transform: translateY(-7px) rotate(-4deg); }

.reveal-whisper {
  position: fixed;
  right: 28px;
  top: 28px;
  z-index: 11;
  max-width: 360px;
  padding: 18px 22px;
  background: rgba(243, 231, 211, .9);
  color: var(--murasaki-ink);
  font-family: var(--font-brush);
  font-size: 1.1rem;
  opacity: 0;
  transform: translateY(-12px) rotate(1deg);
  transition: opacity .3s, transform .3s;
  clip-path: polygon(2% 0, 100% 7%, 95% 100%, 0 90%);
}
.reveal-whisper.visible { opacity: 1; transform: translateY(0) rotate(-1deg); }
.chapter-name { position: fixed; left: 24px; top: 24px; z-index: 9; font-family: var(--font-brush); color: var(--heian-gold); letter-spacing: .16em; }

.clue-object { transition: transform .35s ease, filter .35s ease; }
.clue-object:hover { transform: translateY(-6px) rotate(-1deg); filter: drop-shadow(0 0 18px rgba(217,199,242,.7)); }

@keyframes micaDrift { to { background-position: 73px 83px, -127px 101px, 41px -59px; } }
@keyframes drawWidth { from { transform: scaleX(0); } to { transform: scaleX(1); } }
@keyframes drawHeight { from { transform: scaleY(0); } to { transform: scaleY(1); } }
@keyframes bloom { from { transform: scale(1); opacity: .45; } to { transform: scale(1.18); opacity: .9; } }
@keyframes wheel { to { transform: rotate(360deg); } }
@keyframes slipFloat { 50% { transform: translateY(18px) rotate(1.5deg); } }
@keyframes smoke { 50% { transform: translate(42px, -34px) scaleX(2); opacity: .3; } }
@keyframes vine { 50% { transform: rotate(4deg); } }

@media (max-width: 760px) {
  .chamber { padding: 24px; }
  h2 { writing-mode: horizontal-tb; }
  .domain-slip, .ribbon-text, .moon-ledger, .bridge-prose, .garden-fragment, .final-scroll { left: auto; margin: 18vh 4vw 0; width: auto; max-width: none; }
  .poem-slips { left: 5vw; gap: 14px; }
  .waka-slip { width: 86px; min-height: 430px; font-size: 1.2rem; }
  .chapter-seals { gap: 5px; }
  .seal { width: 42px; height: 42px; }
}