:root {
  /* Interface labels and coordinates: **Recursive** variable-width dashboard labels */
  --singular-black: #07020D;
  --ion-pink: #FF2BD6;
  --warning-orange: #FF8A00;
  --charge-lime: #B8FF1A;
  --chalk-paper: #FFF7D6;
  --photon-cyan: #00E7FF;
  --thesis-violet: #7B2CFF;
  --display: "Fraunces", Georgia, serif;
  --body: "Literata", Georgia, serif;
  --interface: "Recursive", "Inter", ui-monospace, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--singular-black);
  color: var(--chalk-paper);
  font-family: var(--body);
  overflow-x: hidden;
}

.observatory-shell {
  position: relative;
  min-height: 100vh;
  background:
    radial-gradient(circle at 19% 16%, rgba(255, 43, 214, .22), transparent 24rem),
    radial-gradient(circle at 83% 28%, rgba(0, 231, 255, .16), transparent 22rem),
    radial-gradient(circle at 55% 92%, rgba(123, 44, 255, .28), transparent 28rem),
    var(--singular-black);
}

.neon-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .45;
  background-image:
    linear-gradient(rgba(0, 231, 255, .14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 231, 255, .14) 1px, transparent 1px),
    linear-gradient(rgba(255, 247, 214, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 247, 214, .06) 1px, transparent 1px);
  background-size: 80px 80px, 80px 80px, 20px 20px, 20px 20px;
  mask-image: radial-gradient(circle at center, black, transparent 82%);
}

.axis-spine {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  pointer-events: none;
  background: linear-gradient(transparent, var(--photon-cyan), var(--ion-pink), transparent);
  box-shadow: 0 0 22px var(--photon-cyan), 0 0 42px var(--ion-pink);
  opacity: .7;
  z-index: 1;
}

.axis-spine span {
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--charge-lime);
  box-shadow: 0 0 0 12px rgba(184, 255, 26, .08), 0 0 32px var(--charge-lime);
  left: 50%;
  top: var(--node-y, 24%);
  transform: translate(-50%, -50%);
  transition: top .7s cubic-bezier(.2,.8,.2,1);
}

.top-ledger {
  position: fixed;
  z-index: 10;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: .85rem 1rem;
  font-family: var(--interface);
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .09em;
  background: linear-gradient(180deg, rgba(7, 2, 13, .94), rgba(7, 2, 13, .2));
}

.domain-mark {
  font-family: var(--display);
  font-variation-settings: "wght" 820, "opsz" 34, "SOFT" 70;
  font-size: clamp(1.05rem, 2vw, 1.55rem);
  letter-spacing: -.03em;
}

.domain-mark span { color: var(--ion-pink); }

.coordinate-strip { display: flex; gap: .75rem; flex-wrap: wrap; justify-content: flex-end; color: var(--photon-cyan); }
.coordinate-strip b { color: var(--charge-lime); font-weight: 700; }

main { position: relative; z-index: 2; }

.chapter {
  min-height: 100vh;
  padding: clamp(5rem, 8vw, 7rem) clamp(1rem, 3vw, 2rem) 4.5rem;
  position: relative;
}

.observatory-hero {
  display: grid;
  grid-template-columns: minmax(220px, .72fr) minmax(360px, 1.7fr) minmax(240px, .85fr);
  gap: clamp(.9rem, 2vw, 1.4rem);
  align-items: stretch;
}

.panel {
  border: 1.5px solid rgba(255, 247, 214, .26);
  border-radius: 24px;
  box-shadow: 0 0 0 1px rgba(0, 231, 255, .08), 0 22px 80px rgba(0, 0, 0, .42);
  position: relative;
  overflow: hidden;
  transition: transform .45s ease, border-color .45s ease, box-shadow .45s ease, filter .45s ease;
}

.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(255,255,255,.08), transparent 34%, rgba(0,231,255,.07));
  mix-blend-mode: screen;
}

.in-focus .panel { border-color: rgba(0, 231, 255, .65); filter: saturate(1.18); }
.panel:hover { transform: rotate(var(--tilt, 1deg)) translateY(-4px); box-shadow: 0 0 24px rgba(0,231,255,.18), 0 28px 90px rgba(0,0,0,.55); }

.panel-paper { background: var(--chalk-paper); color: var(--singular-black); --tilt: -1.2deg; }
.panel-ink { background: rgba(7, 2, 13, .82); color: var(--chalk-paper); --tilt: 1.2deg; }
.panel-violet { background: linear-gradient(145deg, rgba(123, 44, 255, .82), rgba(7, 2, 13, .86) 66%); color: var(--chalk-paper); --tilt: .9deg; }

.citation-rail, .lab-rail { padding: 1rem; }
.citation-rail { transform: rotate(-1.2deg); }
.lab-rail { transform: rotate(1.1deg); }

.rail-label, .stage-header, .chapter-kicker {
  font-family: var(--interface);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .72rem;
  font-weight: 750;
}
.rail-label { color: var(--thesis-violet); margin-bottom: 1rem; }
.panel-ink .rail-label { color: var(--photon-cyan); }

.citation-slip, .definition-card, .note-card {
  position: relative;
  border: 1px solid rgba(7, 2, 13, .22);
  border-left: 6px solid var(--ion-pink);
  padding: .9rem;
  margin: 0 0 .9rem;
  background: rgba(255, 255, 255, .36);
}
.citation-slip.active { border-left-color: var(--charge-lime); animation: slipPulse 2.4s infinite; }
.citation-slip span { font-family: var(--interface); color: var(--thesis-violet); font-weight: 900; }
.citation-slip p, .definition-card p, .note-card p { margin: .45rem 0 0; line-height: 1.35; }
.definition-card h3, .note-card h3 { margin: 0; font-family: var(--display); font-size: 1.35rem; }
.note-card.warning { border-color: rgba(255, 138, 0, .65); border-left-color: var(--warning-orange); background: rgba(255, 138, 0, .08); }

.theorem-stage { padding: clamp(1rem, 2.2vw, 1.5rem); display: flex; flex-direction: column; min-height: calc(100vh - 10rem); }
.stage-header { display: flex; justify-content: space-between; gap: 1rem; color: var(--charge-lime); }

h1, h2, h3 { font-family: var(--display); }
h1 {
  margin: .5rem 0 .2rem;
  font-size: clamp(3.2rem, 9.2vw, 8.4rem);
  line-height: .82;
  letter-spacing: -.075em;
  font-variation-settings: "wght" var(--title-weight, 820), "opsz" 120, "SOFT" var(--title-soft, 35), "WONK" 1;
  text-shadow: 0 0 18px rgba(255, 43, 214, .35), 0 0 34px rgba(0, 231, 255, .2);
  transition: font-variation-settings .25s ease;
}
h1 em { color: var(--ion-pink); font-style: normal; }
.lead { max-width: 62rem; margin: .7rem 0 1rem; font-size: clamp(1rem, 1.5vw, 1.35rem); line-height: 1.35; color: rgba(255, 247, 214, .86); }

.glyph-board { flex: 1; min-height: 360px; border: 1px dashed rgba(0, 231, 255, .38); border-radius: 18px; background: radial-gradient(circle at center, rgba(0,231,255,.08), transparent 36%), rgba(7,2,13,.38); }
.field-svg { width: 100%; height: 100%; min-height: 360px; display: block; }
.field-line, .ring, .broken-ring, .tangent, .escape-line { fill: none; stroke-linecap: round; stroke-linejoin: round; filter: url(#glow); }
.field-line { stroke-width: 3; stroke-dasharray: 16 16; animation: fieldDash 12s linear infinite; }
.cyan { stroke: var(--photon-cyan); }
.lime { stroke: var(--charge-lime); animation-duration: 10s; }
.pink { stroke: var(--ion-pink); animation-duration: 8s; }
.ring { stroke: rgba(255, 247, 214, .55); stroke-width: 2; stroke-dasharray: 6 12; }
.ring-two { stroke: var(--photon-cyan); opacity: .7; }
.broken-ring { stroke: var(--warning-orange); stroke-width: 5; stroke-dasharray: 36 24; }
.tangent { stroke: var(--ion-pink); stroke-width: 2; opacity: .7; }
.escape-line { stroke: var(--charge-lime); stroke-width: 4; stroke-dasharray: 220; animation: drawEscape 3.5s ease-in-out infinite alternate; }
.monopole-node { fill: var(--charge-lime); filter: url(#glow); animation: nodeBeat 1.8s ease-out infinite; }
.pulse-ring { fill: none; stroke: var(--ion-pink); stroke-width: 3; transform-origin: 320px 260px; animation: ringPulse 1.8s ease-out infinite; }
.orbit { fill: none; stroke-width: 4; filter: url(#glow); animation: orbitTwitch 4s ease-in-out infinite; }
.triangle-one { stroke: var(--warning-orange); }
.triangle-two { stroke: var(--ion-pink); animation-delay: .6s; }
.square-one { stroke: var(--charge-lime); animation-delay: 1.1s; }
.svg-label { fill: var(--chalk-paper); font-family: var(--interface); font-size: 16px; letter-spacing: .08em; text-transform: uppercase; }
.label-b { fill: var(--warning-orange); font-size: 38px; animation: qPulse 1.2s steps(2) infinite; }

.gauge-stack { display: grid; gap: .72rem; }
.gauge { font-family: var(--interface); font-size: .75rem; text-transform: uppercase; display: grid; grid-template-columns: 72px 1fr auto; align-items: center; gap: .55rem; }
.gauge i { display: block; height: 10px; border: 1px solid rgba(255,247,214,.25); border-radius: 999px; overflow: hidden; background: rgba(255,247,214,.08); }
.gauge i::before { content: ""; display: block; height: 100%; width: var(--gauge-fill, 50%); background: linear-gradient(90deg, var(--photon-cyan), var(--charge-lime), var(--ion-pink)); box-shadow: 0 0 16px currentColor; transition: width 1s ease; }
.gauge b { color: var(--warning-orange); font-weight: 850; }

.proof-dashboard, .debate-zone, .construction, .open-problem {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1rem;
  align-items: center;
}
.chapter-plate { grid-column: 1 / span 5; padding: clamp(1.2rem, 2.8vw, 2rem); transform: rotate(-1deg); }
.diagram-card { padding: 1.2rem; min-height: 280px; }
.proof-dashboard .diagram-card:nth-of-type(2) { grid-column: 6 / span 3; transform: rotate(1.4deg); }
.proof-dashboard .diagram-card:nth-of-type(3) { grid-column: 9 / span 4; transform: rotate(-1deg); }
.chapter-kicker { color: var(--ion-pink); }
.panel-paper .chapter-kicker { color: var(--thesis-violet); }
h2 { font-size: clamp(2.2rem, 5.6vw, 5.8rem); line-height: .9; letter-spacing: -.055em; margin: .4rem 0 1rem; font-variation-settings: "wght" 760, "opsz" 96, "SOFT" 55, "WONK" 1; }
.chapter p, .chapter li { font-size: clamp(1rem, 1.45vw, 1.18rem); line-height: 1.45; }
.node-dot { width: 18px; height: 18px; display: block; border-radius: 50%; background: var(--charge-lime); box-shadow: 0 0 0 8px rgba(184,255,26,.1), 0 0 24px var(--charge-lime); animation: nodeBeat 2s infinite; }
.node-dot.pink { background: var(--ion-pink); box-shadow: 0 0 0 8px rgba(255,43,214,.1), 0 0 24px var(--ion-pink); }
.mini-grid { height: 150px; margin: 1rem 0; display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--photon-cyan); background-image: linear-gradient(rgba(0,231,255,.18) 1px, transparent 1px), linear-gradient(90deg, rgba(0,231,255,.18) 1px, transparent 1px); background-size: 18px 18px; }
.mini-grid span:nth-child(3) { background: var(--singular-black); border: 2px dashed var(--warning-orange); }
.magnet-sketch { position: relative; height: 150px; margin: 1rem 0; display: flex; align-items: center; justify-content: center; gap: .55rem; font-family: var(--interface); font-weight: 900; }
.magnet-sketch b { width: 160px; height: 42px; border-radius: 30px; border: 3px solid var(--photon-cyan); border-right-color: transparent; box-shadow: 0 0 22px rgba(0,231,255,.32); }
.magnet-sketch i, .magnet-sketch em { font-style: normal; font-size: 2rem; }
.magnet-sketch i { color: var(--charge-lime); }
.magnet-sketch em { color: var(--warning-orange); animation: qPulse 1.1s steps(2) infinite; }

.equation-duel { grid-column: 2 / span 7; padding: 2rem; transform: rotate(.8deg); }
.open-margins { grid-column: 9 / span 3; padding: 1.3rem; transform: rotate(-1.4deg); }
.duel-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: .75rem; margin-top: 1.2rem; }
.duel-grid article { border: 1px solid rgba(0,231,255,.4); padding: 1rem; min-height: 190px; background: rgba(0,231,255,.06); }
.duel-grid b { color: var(--charge-lime); font-family: var(--display); font-size: clamp(1.7rem, 3vw, 3rem); }
mark { background: transparent; color: var(--charge-lime); font-family: var(--display); font-variation-settings: "wght" 850, "opsz" 60, "SOFT" 20; text-shadow: 0 0 14px rgba(184,255,26,.35); }
.lab-toggle { border: 1px solid var(--singular-black); background: var(--ion-pink); color: var(--singular-black); font-family: var(--interface); font-weight: 900; text-transform: uppercase; padding: .8rem 1rem; border-radius: 999px; cursor: pointer; box-shadow: 4px 4px 0 var(--warning-orange); }
.warnings-muted .warning, .warnings-muted .label-b, .warnings-muted .node-dot.pink { opacity: .24; filter: grayscale(.7); }

.construction-map { grid-column: 1 / span 8; padding: 2rem; }
.archive-notes { grid-column: 9 / span 4; padding: 1.3rem; transform: rotate(1deg); }
.fragment-cloud { min-height: 300px; position: relative; margin-top: 1rem; }
.fragment-cloud span { position: absolute; display: inline-grid; place-items: center; min-width: 88px; min-height: 56px; padding: .5rem .8rem; border: 2px solid currentColor; font-family: var(--interface); text-transform: uppercase; font-size: .72rem; color: var(--photon-cyan); background: rgba(7,2,13,.52); box-shadow: 0 0 20px rgba(0,231,255,.16); animation: specimenFloat 5s ease-in-out infinite; }
.fragment-cloud span:nth-child(1) { left: 6%; top: 12%; color: var(--warning-orange); clip-path: polygon(50% 0,100% 100%,0 100%); }
.fragment-cloud span:nth-child(2) { left: 30%; top: 44%; color: var(--charge-lime); }
.fragment-cloud span:nth-child(3) { left: 58%; top: 20%; color: var(--ion-pink); transform: skew(-12deg); }
.fragment-cloud span:nth-child(4) { left: 72%; top: 60%; border-radius: 50%; color: var(--photon-cyan); }
.fragment-cloud span:nth-child(5) { left: 15%; top: 72%; color: var(--chalk-paper); }
.fragment-cloud span:nth-child(6) { left: 48%; top: 76%; color: var(--warning-orange); font-size: 1.5rem; }

.final-tableau { grid-column: 2 / span 10; padding: clamp(1.4rem, 4vw, 3rem); text-align: left; min-height: 62vh; display: flex; flex-direction: column; justify-content: center; }
.unanswered-nodes { display: flex; gap: clamp(1rem, 4vw, 4rem); margin-top: 2rem; }
.unanswered-nodes i { width: clamp(26px, 5vw, 58px); height: clamp(26px, 5vw, 58px); border-radius: 50%; border: 2px solid var(--photon-cyan); box-shadow: 0 0 0 0 rgba(0,231,255,.45); animation: openPulse 2s infinite; }
.unanswered-nodes i:nth-child(2) { border-color: var(--ion-pink); animation-delay: .25s; }
.unanswered-nodes i:nth-child(3) { border-color: var(--charge-lime); animation-delay: .5s; }
.unanswered-nodes i:nth-child(4) { border-color: var(--warning-orange); animation-delay: .75s; }
.unanswered-nodes i:nth-child(5) { border-color: var(--thesis-violet); animation-delay: 1s; }

.theorem-ticker {
  position: fixed;
  z-index: 12;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  border-top: 1px solid rgba(0,231,255,.5);
  background: var(--chalk-paper);
  color: var(--singular-black);
  font-family: var(--interface);
  text-transform: uppercase;
  font-weight: 850;
  font-size: .75rem;
}
.ticker-track { width: max-content; display: flex; gap: 1.2rem; padding: .65rem 0; animation: ticker 28s linear infinite; }
.ticker-track span { padding-inline: 1rem; border-right: 2px solid var(--ion-pink); }

@keyframes fieldDash { to { stroke-dashoffset: -320; } }
@keyframes drawEscape { from { stroke-dashoffset: 220; } to { stroke-dashoffset: 0; } }
@keyframes nodeBeat { 0%, 100% { transform: scale(1); opacity: 1; } 50% { transform: scale(1.18); opacity: .82; } }
@keyframes ringPulse { 0% { transform: scale(.7); opacity: .9; } 100% { transform: scale(2.4); opacity: 0; } }
@keyframes orbitTwitch { 0%, 100% { transform: translate(0,0) rotate(0deg); } 42% { transform: translate(4px,-8px) rotate(3deg); } 48% { transform: translate(-3px,4px) rotate(-2deg); } }
@keyframes qPulse { 0%, 55% { opacity: 1; } 56%, 100% { opacity: .25; } }
@keyframes slipPulse { 0%, 100% { box-shadow: inset 0 0 0 rgba(184,255,26,0); } 50% { box-shadow: inset 0 0 24px rgba(184,255,26,.22); } }
@keyframes specimenFloat { 0%, 100% { translate: 0 0; } 50% { translate: 0 -14px; } }
@keyframes openPulse { 0% { box-shadow: 0 0 0 0 currentColor; opacity: 1; } 100% { box-shadow: 0 0 0 24px rgba(0,0,0,0); opacity: .25; } }
@keyframes ticker { to { transform: translateX(-50%); } }

@media (max-width: 1000px) {
  .observatory-hero, .proof-dashboard, .debate-zone, .construction, .open-problem { grid-template-columns: 1fr; }
  .citation-rail, .theorem-stage, .lab-rail, .chapter-plate, .proof-dashboard .diagram-card:nth-of-type(2), .proof-dashboard .diagram-card:nth-of-type(3), .equation-duel, .open-margins, .construction-map, .archive-notes, .final-tableau { grid-column: 1; transform: none; }
  .duel-grid { grid-template-columns: 1fr; }
  .coordinate-strip span:nth-child(2) { display: none; }
}

@media (max-width: 620px) {
  .top-ledger { position: absolute; display: block; }
  .coordinate-strip { justify-content: flex-start; margin-top: .4rem; }
  .chapter { padding-inline: .75rem; }
  .stage-header { display: block; }
  .glyph-board, .field-svg { min-height: 300px; }
}