:root {
  /* DESIGN typography tokens: IBM Plex Mono** used sparingly for pseudo-prompts; IBM Plex Sans Condensed** for explanatory copy. */
  --midnight: #09070F;
  --oxblood: #3A0D1D;
  --plum: #241235;
  --parchment: #E9D8A6;
  --magenta: #FF2DB2;
  --cyan: #13F7FF;
  --lime: #B8FF2C;
  --orange: #FF7A18;
  --ink: rgba(9, 7, 15, 0.92);
  --body: "IBM Plex Sans Condensed", "Inter", Arial, sans-serif;
  --display: "Bungee Shade", Impact, fantasy;
  --serif: "Fraunces", Georgia, serif;
  --mono: "IBM Plex Mono", "Courier New", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--parchment);
  font-family: var(--body);
  background:
    radial-gradient(circle at 20% 8%, rgba(255, 122, 24, 0.16), transparent 28rem),
    radial-gradient(circle at 86% 16%, rgba(255, 45, 178, 0.13), transparent 24rem),
    linear-gradient(135deg, var(--midnight) 0%, var(--plum) 45%, var(--oxblood) 100%);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(90deg, rgba(233, 216, 166, 0.025) 0 1px, transparent 1px 6px),
    repeating-linear-gradient(0deg, rgba(19, 247, 255, 0.018) 0 1px, transparent 1px 9px);
  mix-blend-mode: screen;
  z-index: 5;
}

.lamp-wash {
  position: fixed;
  inset: -10vh -10vw;
  pointer-events: none;
  background: radial-gradient(circle at 18% 5%, rgba(233, 216, 166, 0.28), transparent 18rem);
  opacity: 0;
  animation: lampOn 2.4s ease forwards;
  z-index: 1;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.34;
  z-index: 4;
  background-image:
    radial-gradient(circle at 10% 20%, rgba(233,216,166,.11) 0 1px, transparent 1px),
    radial-gradient(circle at 70% 80%, rgba(255,45,178,.08) 0 1px, transparent 1px);
  background-size: 17px 19px, 23px 29px;
}

.cursor-quill {
  position: fixed;
  width: 18px;
  height: 38px;
  pointer-events: none;
  z-index: 30;
  transform: translate(-50%, -50%) rotate(-28deg);
  opacity: 0;
  clip-path: polygon(58% 0, 83% 12%, 57% 100%, 41% 100%, 47% 24%, 17% 39%);
  background: linear-gradient(180deg, var(--cyan), var(--magenta) 55%, var(--orange));
  filter: drop-shadow(0 0 12px var(--cyan));
}

.archive { position: relative; z-index: 2; }

.room {
  position: relative;
  min-height: 100vh;
  padding: clamp(2rem, 5vw, 5.5rem);
  overflow: hidden;
  border-bottom: 1px solid rgba(233,216,166,.12);
}

.scriptorium { padding-top: clamp(2rem, 4vw, 4rem); }

.room::after {
  content: "";
  position: absolute;
  inset: 1.2rem;
  border: 1px solid rgba(19, 247, 255, .16);
  clip-path: polygon(0 0, 94% 0, 100% 8%, 100% 100%, 6% 100%, 0 92%);
  pointer-events: none;
}

.wordmark-panel { max-width: 61rem; position: relative; z-index: 3; }

.overline {
  margin: 0 0 .65rem;
  color: var(--lime);
  font-family: var(--mono);
  font-size: clamp(.68rem, 1.1vw, .9rem);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.wordmark {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(4.2rem, 13vw, 13.5rem);
  line-height: .78;
  letter-spacing: -.08em;
  color: var(--parchment);
  text-shadow: 0 0 13px rgba(19,247,255,.55), 0 0 42px rgba(255,45,178,.36);
  opacity: 0;
  transform: translateY(26px) skewX(-4deg);
  animation: wireTitle 1.8s .35s cubic-bezier(.2,.9,.2,1) forwards;
}

.pin-dot {
  color: var(--cyan);
  letter-spacing: -.1em;
  text-shadow: 0 0 7px var(--cyan), 0 0 22px var(--cyan), 0 0 44px var(--magenta);
  animation: pinPulse 1.7s infinite alternate;
}

.intro {
  max-width: 47rem;
  margin: 1.2rem 0 0;
  color: rgba(233,216,166,.82);
  font-size: clamp(1.15rem, 2vw, 1.8rem);
  line-height: 1.18;
}

.masonry-wall {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-flow: dense;
  gap: clamp(.85rem, 1.5vw, 1.35rem);
  margin-top: clamp(2rem, 5vw, 4rem);
}

.hero-wall { align-items: start; max-width: 78rem; }

.tile {
  position: relative;
  min-height: 10rem;
  padding: clamp(1rem, 2vw, 1.65rem);
  color: var(--ink);
  background: var(--parchment);
  box-shadow: 0 22px 42px rgba(0,0,0,.42), inset 0 0 0 1px rgba(58,13,29,.22);
  opacity: 0;
  transform: translateY(42px) rotate(var(--rot, 0deg));
  transition: opacity .9s ease, transform .9s cubic-bezier(.2,.9,.2,1), filter .5s ease;
  clip-path: polygon(5% 0, 100% 0, 95% 90%, 82% 100%, 0 96%, 0 11%);
}

.tile.is-visible { opacity: 1; transform: translateY(0) rotate(var(--rot, 0deg)); }
.tile:hover { filter: saturate(1.2) brightness(1.05); }

.tile::before {
  content: "";
  position: absolute;
  inset: .45rem;
  border: 1px dashed rgba(58, 13, 29, .26);
  clip-path: inherit;
  pointer-events: none;
}

.tile::after {
  content: "";
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: .85rem;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--magenta), var(--cyan), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .8s ease;
}

.tile.is-visible::after { transform: scaleX(1); }

.tall { grid-column: span 5; min-height: 22rem; }
.wide { grid-column: span 5; min-height: 13rem; }
.medium { grid-column: span 4; min-height: 16rem; }
.small { grid-column: span 3; min-height: 10rem; }
.shard { clip-path: polygon(0 9%, 87% 0, 100% 17%, 91% 100%, 12% 91%); }
.vellum { background: linear-gradient(145deg, #E9D8A6, #d9bd75); }
.parchment { background: linear-gradient(135deg, #E9D8A6 0%, #f6e6b5 48%, #cfae63 100%); }
.tablet.black { background: linear-gradient(145deg, #09070F, #241235); color: var(--parchment); box-shadow: 0 0 0 1px rgba(19,247,255,.28), 0 24px 48px rgba(0,0,0,.58); }
.orange { background: linear-gradient(140deg, var(--orange), #E9D8A6 75%); }
.lime { background: linear-gradient(135deg, var(--lime), #E9D8A6); }
.magenta { background: linear-gradient(135deg, var(--magenta), #E9D8A6 82%); }

.tile h2, .tile h3 {
  margin: .1rem 0 .7rem;
  font-family: var(--serif);
  font-weight: 900;
  line-height: .92;
}
.tile h2 { font-size: clamp(2rem, 4vw, 4.4rem); }
.tile h3 { font-size: clamp(1.45rem, 2.4vw, 2.5rem); }
.tile p { margin: 0; font-size: clamp(1rem, 1.35vw, 1.28rem); line-height: 1.18; }
.mono { font-family: var(--mono); color: var(--cyan); font-size: .82rem; text-shadow: 0 0 9px var(--cyan); }
.lesson-tab, .seal {
  display: inline-grid;
  place-items: center;
  margin-bottom: 1rem;
  padding: .35rem .65rem;
  background: var(--oxblood);
  color: var(--lime);
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: .14em;
  box-shadow: 0 0 16px rgba(184,255,44,.45);
}
.seal { width: 3rem; height: 3rem; border-radius: 50%; color: var(--cyan); }
.pull { font-family: var(--serif); font-weight: 900; font-style: italic; font-size: clamp(2rem, 4vw, 3.8rem) !important; }
.chalk-line { position:absolute; width:70%; height:4px; right:1rem; top:38%; background:var(--cyan); box-shadow:0 0 15px var(--cyan); transform:rotate(-12deg); }

.room-orb, .final-blot {
  position: absolute;
  width: clamp(18rem, 35vw, 36rem);
  height: clamp(18rem, 35vw, 36rem);
  border-radius: 58% 42% 63% 37% / 43% 61% 39% 57%;
  filter: blur(18px);
  opacity: .45;
  animation: crawlBlob 9s ease-in-out infinite alternate;
}
.orb-cyan { right: 9vw; top: 12vh; background: radial-gradient(circle, rgba(19,247,255,.62), transparent 67%); }
.orb-magenta { left: 30vw; bottom: -10vh; background: radial-gradient(circle, rgba(255,45,178,.48), transparent 67%); animation-delay: -4s; }
.orb-lime { right: -5vw; top: 22vh; background: radial-gradient(circle, rgba(184,255,44,.38), transparent 70%); }
.final-blot { left: 10vw; top: 18vh; background: radial-gradient(circle, rgba(255,122,24,.55), rgba(255,45,178,.2), transparent 70%); }

.room-heading {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: flex-start;
  gap: clamp(1rem, 2.2vw, 2rem);
  max-width: 72rem;
}
.room-heading.diagonal { transform: rotate(-1.5deg); }
.chapter-no {
  font-family: var(--display);
  font-size: clamp(4rem, 10vw, 10rem);
  line-height: .8;
  color: var(--orange);
  text-shadow: 0 0 22px rgba(255,122,24,.8);
}
.room-heading h2, .desk-card h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.7rem, 7vw, 7.5rem);
  line-height: .82;
  color: var(--parchment);
  text-shadow: 0 0 22px rgba(255,45,178,.28);
}

.lab-bench { display:grid; grid-template-columns: minmax(17rem, .75fr) 1.8fr; gap: clamp(1rem, 4vw, 4rem); align-items:center; min-height: 62vh; position:relative; z-index:3; }
.profile-blob {
  display:grid; place-items:center; aspect-ratio: 1; padding:2rem; border-radius: 47% 53% 61% 39% / 56% 34% 66% 44%;
  background: radial-gradient(circle at 35% 32%, rgba(184,255,44,.9), rgba(19,247,255,.34) 45%, rgba(36,18,53,.55) 72%);
  color: var(--midnight); font-family: var(--serif); font-weight:900; font-size:clamp(1.8rem,3vw,3.4rem); line-height:.92; text-align:center;
  box-shadow: 0 0 44px rgba(184,255,44,.45), inset 0 0 35px rgba(255,255,255,.18);
  animation: crawlBlob 7s ease-in-out infinite alternate;
}
.profile-blob.absorb { transform: scale(1.08) rotate(4deg); filter: hue-rotate(34deg) saturate(1.4); }
.lab-wall { margin-top:0; }
.news-fragment { grid-column: span 6; }
.news-fragment[data-signal="discard"].absorbed { opacity:.22; transform: translateY(18px) rotate(var(--rot)) scale(.92); filter: blur(1px); }

.split-stage { position:relative; z-index:3; display:grid; grid-template-columns: 1.5fr .8fr; gap:clamp(1rem,3vw,3rem); align-items:center; min-height: 62vh; }
.headline-split { grid-column: auto; display:grid; grid-template-columns:1fr 1fr; gap:1rem; min-height:26rem; overflow:hidden; }
.split-half { padding: clamp(1rem,2vw,2rem); border:1px solid rgba(58,13,29,.25); transition: transform .8s cubic-bezier(.2,.9,.2,1); }
.split-half span { font-family:var(--mono); color:var(--magenta); text-transform:uppercase; }
.headline-split.is-split .left { transform: translateX(-4%) rotate(-3deg); }
.headline-split.is-split .right { transform: translateX(4%) rotate(3deg); }
.bias-warning { position:relative; padding:2rem; background:linear-gradient(140deg, var(--oxblood), var(--plum)); color:var(--parchment); clip-path:polygon(0 0, 88% 0, 100% 20%, 93% 100%, 9% 94%); box-shadow: 0 0 32px rgba(255,122,24,.35); }
.bias-warning::before { content:""; position:absolute; right:0; top:0; border-left:4.5rem solid transparent; border-bottom:4.5rem solid var(--orange); filter:drop-shadow(0 0 14px var(--orange)); transform-origin:top right; transition:transform .7s ease; }
.bias-warning.is-folded::before { transform: rotate(-22deg); }
.bias-warning strong { color:var(--orange); font-family:var(--mono); text-transform:uppercase; }
.bias-warning p { font-size:1.35rem; line-height:1.15; }

.stair-grid { position:relative; z-index:3; display:grid; grid-template-columns: repeat(8,1fr); gap:1rem; min-height:64vh; margin-top:3rem; align-items:center; }
.step-card { grid-column: span 3; min-height:15rem; }
.step-card:nth-of-type(2) { grid-column-start:3; transform: translateY(3rem) rotate(var(--rot)); }
.step-card:nth-of-type(3) { grid-column-start:5; transform: translateY(6rem) rotate(var(--rot)); }
.step-card:nth-of-type(4) { grid-column-start:6; transform: translateY(1rem) rotate(var(--rot)); }
.step-card.is-visible:nth-of-type(2) { transform: translateY(3rem) rotate(var(--rot)); }
.step-card.is-visible:nth-of-type(3) { transform: translateY(6rem) rotate(var(--rot)); }
.step-card.is-visible:nth-of-type(4) { transform: translateY(1rem) rotate(var(--rot)); }
.ruler-path { position:absolute; left:8%; top:48%; width:0; height:5px; background:linear-gradient(90deg,var(--cyan),var(--lime),var(--orange)); box-shadow:0 0 20px var(--cyan); transform:rotate(11deg); transform-origin:left; transition:width 1.5s cubic-bezier(.2,.9,.2,1); }
.ruler-path.is-drawn { width:82%; }

.final-desk { display:grid; place-items:center; }
.desk-card { position:relative; z-index:3; max-width:64rem; padding: clamp(2rem,5vw,5rem); background:rgba(9,7,15,.76); border:1px solid rgba(233,216,166,.24); clip-path:polygon(4% 0,100% 0,96% 100%,0 92%); box-shadow:0 0 45px rgba(19,247,255,.18), inset 0 0 0 1px rgba(255,45,178,.16); }
.desk-card p:last-child { font-size:clamp(1.2rem,2vw,1.9rem); color:rgba(233,216,166,.82); line-height:1.18; }
.floating-controls { position:fixed; right:1.25rem; bottom:1.25rem; z-index:20; display:flex; flex-direction:column; gap:.55rem; }
.glyph-control { border:1px solid rgba(19,247,255,.4); background:rgba(9,7,15,.72); color:var(--parchment); font-family:var(--mono); padding:.65rem .8rem; cursor:pointer; clip-path:polygon(0 0, 88% 0, 100% 28%, 91% 100%, 0 100%); box-shadow:0 0 15px rgba(19,247,255,.12); transition:background .25s, color .25s, transform .25s; }
.glyph-control:hover, .glyph-control.is-lit { background:var(--cyan); color:var(--midnight); transform:translateX(-4px); }
.room-index { position:fixed; left:1.2rem; bottom:1.2rem; z-index:20; font-family:var(--mono); color:var(--lime); background:rgba(9,7,15,.65); border:1px solid rgba(184,255,44,.3); padding:.7rem .9rem; text-transform:uppercase; letter-spacing:.12em; }

@keyframes lampOn { 0%{opacity:0; transform:scale(.7);} 55%{opacity:1;} 100%{opacity:.72; transform:scale(1);} }
@keyframes wireTitle { 0%{opacity:0; filter:brightness(.2);} 45%{opacity:1; filter:brightness(2.2);} 100%{opacity:1; transform:translateY(0) skewX(0); filter:brightness(1);} }
@keyframes pinPulse { from{filter:brightness(1);} to{filter:brightness(1.8) drop-shadow(0 0 14px var(--cyan));} }
@keyframes crawlBlob { from{transform:translate3d(-1rem,.4rem,0) scale(.95) rotate(0deg); border-radius:58% 42% 63% 37% / 43% 61% 39% 57%;} to{transform:translate3d(1.4rem,-.8rem,0) scale(1.08) rotate(10deg); border-radius:38% 62% 39% 61% / 67% 34% 66% 33%;} }

@media (max-width: 900px) {
  .room { padding: 2rem 1rem 5rem; }
  .masonry-wall, .stair-grid { grid-template-columns: repeat(6, 1fr); }
  .tall, .wide, .medium, .small, .news-fragment, .step-card { grid-column: span 6 !important; }
  .lab-bench, .split-stage, .headline-split { grid-template-columns:1fr; }
  .chapter-no { font-size:4.5rem; }
  .floating-controls { flex-direction:row; left:1rem; right:1rem; justify-content:center; }
  .room-index { display:none; }
}