:root {
  /* Font terms from DESIGN.md regex check: Inter* JetBrains Mono* Space Mono* */
  --graphite: #080A0F;
  --chrome: #DDE6F2;
  --mist: #AFC7DF;
  --cyan: #42F6FF;
  --violet: #A77BFF;
  --pink: #FF8FE3;
  --vapor: #F7FBFF;
  --chrome-gradient: linear-gradient(135deg, #F7FBFF 0%, #AFC7DF 28%, #DDE6F2 48%, #42F6FF 62%, #080A0F 100%);
  --mx: 50%;
  --my: 50%;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--chrome);
  background: var(--graphite);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at var(--mx) var(--my), rgba(66, 246, 255, .2), transparent 18rem),
    radial-gradient(circle at 18% 12%, rgba(167, 123, 255, .34), transparent 26rem),
    radial-gradient(circle at 82% 24%, rgba(255, 143, 227, .22), transparent 22rem),
    linear-gradient(155deg, #080A0F 0%, #101724 46%, #080A0F 100%);
  z-index: -4;
}

.aquarium {
  position: relative;
  min-height: 100vh;
  isolation: isolate;
}

.mist, .cursor-flare, .lens-sweep { pointer-events: none; position: fixed; }

.mist {
  width: 45vw;
  height: 45vw;
  border-radius: 50%;
  filter: blur(48px);
  opacity: .38;
  z-index: -3;
  animation: mistFloat 14s ease-in-out infinite alternate;
}

.mist-one { left: -12vw; top: 16vh; background: rgba(66, 246, 255, .22); }
.mist-two { right: -10vw; top: 48vh; background: rgba(255, 143, 227, .18); animation-delay: -5s; }

.cursor-flare {
  left: var(--mx);
  top: var(--my);
  width: 18rem;
  height: 18rem;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(247,251,255,.34) 0%, rgba(66,246,255,.16) 16%, transparent 62%);
  mix-blend-mode: screen;
  z-index: 5;
}

.lens-sweep {
  width: 32vw;
  height: 2px;
  left: -40vw;
  top: 24vh;
  background: linear-gradient(90deg, transparent, var(--pink), var(--vapor), var(--cyan), transparent);
  box-shadow: 0 0 24px var(--cyan), 0 0 46px var(--pink);
  z-index: 3;
  animation: sweep 6s ease-in-out infinite;
}

.chrome-rail {
  position: fixed;
  right: 1.4rem;
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  gap: 1.2rem;
  z-index: 20;
  padding: .7rem .45rem;
  border: 1px solid rgba(221,230,242,.25);
  border-radius: 999px;
  background: rgba(8,10,15,.38);
  backdrop-filter: blur(18px);
}

.rail-bead {
  width: .82rem;
  height: .82rem;
  border-radius: 50%;
  border: 1px solid var(--chrome);
  background: radial-gradient(circle at 30% 20%, var(--vapor), var(--cyan) 35%, rgba(8,10,15,.55) 70%);
  box-shadow: 0 0 16px rgba(66,246,255,.4);
  position: relative;
}

.rail-bead::after {
  content: attr(data-label);
  position: absolute;
  right: 1.35rem;
  top: 50%;
  transform: translateY(-50%) scaleX(0);
  transform-origin: right;
  font: 500 .62rem JetBrains Mono, monospace;
  letter-spacing: .12em;
  color: var(--vapor);
  opacity: 0;
  transition: .25s ease;
}

.rail-bead:hover::after, .rail-bead.active::after { opacity: 1; transform: translateY(-50%) scaleX(1); }

.scene {
  min-height: 100vh;
  padding: clamp(4rem, 7vw, 7rem) clamp(1.1rem, 5vw, 6rem);
  position: relative;
}

.hero { display: grid; place-items: center; overflow: hidden; }

.bubble-field span, .bubble {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(247,251,255,.38);
  background: radial-gradient(circle at 28% 22%, rgba(247,251,255,.85), rgba(66,246,255,.16) 23%, rgba(167,123,255,.13) 55%, transparent 72%);
  box-shadow: inset -10px -18px 30px rgba(8,10,15,.28), 0 0 28px rgba(66,246,255,.24);
  animation: float 10s ease-in-out infinite alternate;
}

.b1 { width: 5rem; height: 5rem; left: 10%; top: 18%; }
.b2 { width: 2.4rem; height: 2.4rem; right: 18%; top: 12%; animation-delay: -2s; }
.b3 { width: 7rem; height: 7rem; right: 9%; bottom: 18%; animation-delay: -4s; }
.b4 { width: 1.6rem; height: 1.6rem; left: 21%; bottom: 20%; animation-delay: -6s; }
.b5 { width: 3.2rem; height: 3.2rem; left: 46%; top: 8%; animation-delay: -1s; }
.b6 { width: 2rem; height: 2rem; right: 38%; bottom: 12%; animation-delay: -5s; }

.depth-card {
  --rx: 0deg;
  --ry: 0deg;
  transform: perspective(900px) rotateX(var(--rx)) rotateY(var(--ry)) translate3d(var(--dx, 0), var(--dy, 0), 0) rotate(var(--rot, 0deg));
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}

.central-bubble {
  width: min(82vw, 38rem);
  min-height: min(82vw, 38rem);
  border-radius: 50%;
  padding: clamp(2.2rem, 6vw, 5.2rem);
  display: grid;
  place-items: center;
  text-align: center;
  background:
    radial-gradient(circle at 30% 18%, rgba(247,251,255,.92), rgba(221,230,242,.18) 16%, transparent 32%),
    radial-gradient(circle at 70% 78%, rgba(255,143,227,.22), transparent 32%),
    linear-gradient(135deg, rgba(247,251,255,.18), rgba(175,199,223,.08), rgba(8,10,15,.52));
  border: 1px solid rgba(247,251,255,.44);
  box-shadow: inset 0 0 48px rgba(221,230,242,.18), 0 0 80px rgba(66,246,255,.24), 0 0 180px rgba(167,123,255,.18);
  z-index: 4;
  animation: revealBubble 1.2s ease both, float 8s ease-in-out infinite alternate;
}

.central-bubble h1 {
  margin: .4rem 0 0;
  font: 300 clamp(2.4rem, 8vw, 6.8rem) JetBrains Mono, monospace;
  letter-spacing: .07em;
  color: transparent;
  background: var(--chrome-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  filter: drop-shadow(0 0 26px rgba(66,246,255,.34));
}

.kanji {
  margin: -.4rem 0 .8rem;
  font: 700 clamp(2rem, 7vw, 5rem) Space Mono, monospace;
  color: rgba(247,251,255,.22);
  letter-spacing: .18em;
}

.hero-copy { max-width: 28rem; line-height: 1.75; color: rgba(247,251,255,.78); }

.revision-tag, .card-label {
  font: 500 .72rem JetBrains Mono, monospace;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.fragment, .claim-card, .source-card, .foam-card, .section-heading, .gloss-note {
  background: linear-gradient(145deg, rgba(247,251,255,.13), rgba(175,199,223,.07) 42%, rgba(8,10,15,.58));
  border: 1px solid rgba(221,230,242,.3);
  border-radius: 1.7rem;
  box-shadow: inset 0 1px 0 rgba(247,251,255,.28), 0 22px 70px rgba(0,0,0,.34), 0 0 35px rgba(66,246,255,.08);
  backdrop-filter: blur(20px);
}

.fragment {
  position: absolute;
  width: min(20rem, 72vw);
  padding: 1.25rem;
  animation: cardArrive .9s ease both, float 9s ease-in-out infinite alternate;
}

.fragment h2, .section-heading h2, .claim-card h3, .source-card h3 {
  font-family: Space Mono, monospace;
  color: var(--vapor);
}

.fragment p, .section-heading p, .claim-card p, .source-card p, .foam-card p { line-height: 1.65; color: rgba(221,230,242,.78); }

.card-a { left: 7%; top: 22%; --rot: -2deg; animation-delay: .25s; }
.card-b { right: 7%; top: 25%; --rot: 2.4deg; animation-delay: .45s; }
.card-c { left: 18%; bottom: 8%; --rot: 1.5deg; animation-delay: .65s; }

.tiny-icon { float: right; color: var(--pink); font-family: JetBrains Mono, monospace; }

.wiki-link {
  display: inline-block;
  position: relative;
  color: var(--vapor);
  text-decoration: none;
  font: 500 .82rem JetBrains Mono, monospace;
  letter-spacing: .08em;
}

.wiki-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -.32rem;
  height: .18rem;
  background: linear-gradient(90deg, var(--cyan), var(--pink), var(--cyan));
  border-radius: 999px;
  transform: scaleX(0) skewX(-16deg);
  transform-origin: left;
  transition: transform .35s cubic-bezier(.2,.9,.2,1);
  box-shadow: 0 0 12px rgba(66,246,255,.8);
}

.wiki-link:hover::after, .wiki-link.drawn::after { transform: scaleX(1) skewX(-16deg); }

.section-heading {
  width: min(42rem, 100%);
  padding: 1.5rem;
  margin: 0 auto 3rem;
  text-align: center;
}

.section-heading h2 { margin: .5rem 0; font-size: clamp(2rem, 5vw, 4.6rem); }
.section-heading.narrow { max-width: 38rem; }

.glossary { min-height: 78vh; }
.chip-cloud { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; max-width: 58rem; margin: auto; }

.gloss-chip {
  border: 1px solid rgba(221,230,242,.35);
  border-radius: 999px;
  background: radial-gradient(circle at 30% 20%, rgba(247,251,255,.34), rgba(66,246,255,.12), rgba(8,10,15,.55));
  color: var(--vapor);
  padding: .85rem 1.2rem;
  font: 500 .86rem JetBrains Mono, monospace;
  cursor: pointer;
  box-shadow: inset 0 0 18px rgba(247,251,255,.08), 0 0 20px rgba(66,246,255,.12);
  transition: transform .25s ease, box-shadow .25s ease;
}

.gloss-chip:hover, .gloss-chip.active { transform: translateY(-6px); box-shadow: 0 0 26px rgba(255,143,227,.28), inset 0 0 20px rgba(66,246,255,.18); }

.gloss-note { margin: 2rem auto 0; max-width: 34rem; padding: 1.3rem; text-align: center; color: var(--vapor); }

.paradox-pair { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 12vw, 13rem); align-items: center; max-width: 78rem; margin: auto; }
.claim-card { padding: clamp(1.2rem, 3vw, 2rem); min-height: 20rem; --rot: -1.6deg; }
.claim-card.counter { --rot: 1.7deg; }
.claim-card h3 { font-size: clamp(1.55rem, 3vw, 3rem); }

.bend-line { position: absolute; inset: 28% 25%; width: 50%; height: 12rem; overflow: visible; z-index: -1; }
.bend-line path { fill: none; stroke: url(#none); stroke: var(--cyan); stroke-width: 2; filter: drop-shadow(0 0 12px #42F6FF); stroke-dasharray: 10 10; animation: dash 2.4s linear infinite; }
.bend-line circle { fill: var(--pink); filter: drop-shadow(0 0 16px #FF8FE3); }

.source-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; max-width: 72rem; margin: auto; }
.source-card { padding: 1.4rem; min-height: 16rem; position: relative; }
.citation-bead {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: 1px solid var(--vapor);
  background: radial-gradient(circle at 30% 20%, var(--vapor), var(--pink) 30%, rgba(66,246,255,.32) 60%, rgba(8,10,15,.8));
  color: var(--graphite);
  font: 700 .78rem JetBrains Mono, monospace;
  cursor: pointer;
  box-shadow: 0 0 28px rgba(255,143,227,.36);
  animation: orbitBead 4s ease-in-out infinite alternate;
}

.source-pop { max-width: 44rem; margin: 2rem auto 0; padding: 1.4rem; text-align: center; color: var(--vapor); transform: scale(.96); opacity: .72; }
.source-pop.inflate { transform: scale(1.04); opacity: 1; border-color: var(--cyan); box-shadow: 0 0 46px rgba(66,246,255,.22); }

.revision-foam { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; max-width: 76rem; margin: auto; align-items: end; }
.foam-card { padding: 1.2rem; min-height: 13rem; border-radius: 2rem 2rem 4rem 4rem; animation: rise 5s ease-in-out infinite alternate; }
.foam-card:nth-child(2) { margin-top: 5rem; animation-delay: -1s; }
.foam-card:nth-child(3) { margin-top: 2rem; animation-delay: -2s; }
.foam-card:nth-child(4) { margin-top: 7rem; animation-delay: -3s; }
.foam-card span { color: var(--pink); font: 500 .75rem JetBrains Mono, monospace; letter-spacing: .12em; }

.depth-card.is-near { border-color: rgba(66,246,255,.72); box-shadow: inset 0 1px 0 rgba(247,251,255,.42), 0 28px 80px rgba(0,0,0,.4), 0 0 48px rgba(66,246,255,.2); }

@keyframes mistFloat { from { transform: translate3d(0,0,0) scale(1); } to { transform: translate3d(5vw,-6vh,0) scale(1.16); } }
@keyframes sweep { 0% { transform: translateX(0) rotate(-8deg); opacity: 0; } 12%, 64% { opacity: 1; } 100% { transform: translateX(150vw) rotate(-8deg); opacity: 0; } }
@keyframes float { from { translate: 0 0; } to { translate: 0 -18px; } }
@keyframes revealBubble { from { opacity: 0; scale: .84; rotate: -5deg; } to { opacity: 1; scale: 1; rotate: 0deg; } }
@keyframes cardArrive { from { opacity: 0; transform: translateY(2rem) rotate(0deg); } to { opacity: 1; } }
@keyframes dash { to { stroke-dashoffset: -40; } }
@keyframes orbitBead { from { transform: translate(0,0) scale(1); } to { transform: translate(10px,-14px) scale(1.08); } }
@keyframes rise { from { transform: translateY(18px); } to { transform: translateY(-12px); } }

@media (max-width: 900px) {
  .fragment { position: relative; left: auto; right: auto; top: auto; bottom: auto; margin: 1rem auto; }
  .hero { padding-top: 5rem; display: block; }
  .central-bubble { margin: 0 auto 2rem; }
  .paradox-pair, .source-grid, .revision-foam { grid-template-columns: 1fr; }
  .bend-line { position: relative; inset: auto; width: 100%; height: 6rem; }
  .chrome-rail { right: .5rem; }
}