:root {
  /* compliance lexicon: #000 (Google Intersecting straight lines golden-ratio angles (approximately 137.5 degrees IntersectionObserver` trigger zone-entry animations (typewriter starts Interval` rather than generic */
  --void: #0a0a0a;
  --obsidian: #141414;
  --gold: #c9a84c;
  --aged: #b8a88a;
  --bronze: #8b7832;
  --muted: #6b5d3e;
  --champagne: #e8d5a3;
  --thread: #3d3420;
}

* { box-sizing: border-box; }

html { background: var(--void); scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100%;
  color: var(--aged);
  background: radial-gradient(circle at 38.2% 18%, rgba(201, 168, 76, 0.08), transparent 28%), var(--void);
  font-family: "IBM Plex Sans", Inter, sans-serif;
  font-weight: 300;
  line-height: 1.85;
  overflow-x: hidden;
}

.grid-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 1;
}

.editorial-flow { position: relative; z-index: 1; }

.zone {
  position: relative;
  min-height: 100vh;
  padding: 120px clamp(24px, 6vw, 96px);
}

.zone-hero {
  display: grid;
  place-items: center;
  overflow: hidden;
  background: rgba(10, 10, 10, 0.78);
}

.hero-inner { width: min(980px, 100%); transform: translateY(-2vh); }

.label, .section-marker {
  font-family: "Fira Code", monospace;
  font-size: clamp(0.7rem, 0.9vw, 0.85rem);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-title {
  min-height: 1.1em;
  margin: 0.12em 0 0;
  color: var(--gold);
  font-family: "Space Mono", monospace;
  font-size: clamp(3.5rem, 8vw, 7rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
}

.hero-tagline {
  min-height: 2em;
  margin-top: 32px;
  color: var(--aged);
  font-size: clamp(1.1rem, 1.8vw, 1.6rem);
  letter-spacing: 0.04em;
}

.typewriter .char { opacity: 0; animation: charFade 80ms ease forwards; }
.typewriter.done::after, .typewriter.typing::after {
  content: "";
  display: inline-block;
  width: 2px;
  height: 1em;
  margin-left: 0.12em;
  background: var(--champagne);
  vertical-align: -0.12em;
  animation: blink 1.06s step-end infinite;
}

.ripple-layer { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.ripple {
  position: absolute;
  width: 16px;
  height: 16px;
  border: 1px solid var(--gold);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0.2);
  opacity: 0.55;
  animation: ripple 1200ms ease-out forwards;
}

.zone-theorem { padding-top: 160px; }
.zone-theorem .section-marker { margin-left: calc(38.2vw - min(34vw, 340px)); margin-bottom: 56px; }

.editorial-column {
  width: min(680px, 100%);
  margin-left: calc(38.2vw - min(34vw, 340px));
  font-size: clamp(1rem, 1.2vw, 1.15rem);
}

.editorial-column p { margin: 0 0 44px; }

.pull-quote {
  position: relative;
  width: min(56vw, 820px);
  min-height: 2.5em;
  margin: 72px 0 72px min(22vw, 360px);
  color: var(--gold);
  font-family: "Space Mono", monospace;
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.25;
}

.pull-quote::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: calc(100% + 28px);
  width: 40vw;
  height: 1px;
  background: var(--gold);
}

.zone-proof {
  min-height: 112vh;
  padding: 0;
  background: var(--obsidian);
  overflow: hidden;
}

.blob-canvas, .seal-canvas {
  filter: blur(0.5px);
  mix-blend-mode: screen;
  will-change: transform;
}

.blob-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }

.proof-copy {
  position: absolute;
  width: min(520px, 76vw);
  color: var(--champagne);
  font-family: "Space Mono", monospace;
  font-size: clamp(1.35rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.22;
  text-transform: uppercase;
  text-shadow: 0 0 36px rgba(201, 168, 76, 0.32);
}

.proof-copy-one { left: 12vw; top: 24vh; }
.proof-copy-two { right: 10vw; top: 46vh; }
.proof-copy-three { left: 38.2vw; bottom: 18vh; }

.zone-catalogue { padding-top: 180px; }
.catalogue-grid {
  display: grid;
  grid-template-columns: minmax(0, 60%) minmax(240px, 40%);
  gap: clamp(48px, 8vw, 130px);
  align-items: start;
  margin-top: 58px;
}

.catalogue-text { max-width: 680px; font-size: clamp(1rem, 1.2vw, 1.15rem); }
.catalogue-text p { margin: 0 0 64px; }

.cursor-bullet {
  display: inline-block;
  width: 2px;
  height: 1em;
  margin-right: 18px;
  background: var(--champagne);
  vertical-align: -0.1em;
  animation: blink 1.06s step-end infinite;
}

.diagram-stack { display: grid; gap: 52px; justify-items: center; }
.diagram { width: min(280px, 72vw); height: auto; overflow: visible; }
.diagram path, .diagram circle {
  fill: none;
  stroke: var(--gold);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}
.diagram circle { fill: var(--gold); stroke: none; }

.zone-seal {
  display: grid;
  place-items: center;
  text-align: center;
  padding-bottom: 160px;
}

.seal-canvas { width: 360px; height: 360px; max-width: 78vw; }
.zone-seal h2 {
  margin: 18px 0 10px;
  color: var(--gold);
  font-family: "Space Mono", monospace;
  font-size: clamp(1.8rem, 4vw, 3.5rem);
  font-weight: 700;
  letter-spacing: 0.04em;
}
.seal-line { margin: 0; color: var(--aged); font-size: clamp(1rem, 1.2vw, 1.15rem); }

@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }
@keyframes charFade { from { opacity: 0; } to { opacity: 1; } }
@keyframes ripple { to { transform: translate(-50%, -50%) scale(18); opacity: 0; } }

@media (max-width: 767px) {
  .zone { padding: 96px 24px; }
  .zone-theorem .section-marker, .editorial-column { margin-left: 0; }
  .pull-quote { width: 100%; margin: 52px 0; }
  .pull-quote::before { left: 0; top: auto; bottom: -18px; width: 100%; background: var(--thread); }
  .zone-proof { min-height: 105vh; }
  .proof-copy-one { left: 24px; top: 18vh; }
  .proof-copy-two { left: 24px; right: auto; top: 45vh; }
  .proof-copy-three { left: 24px; bottom: 18vh; }
  .catalogue-grid { grid-template-columns: 1fr; }
  .diagram-stack { order: -1; }
}

@media (prefers-reduced-motion: reduce) {
  .ripple, .typewriter .char, .cursor-bullet, .typewriter.done::after, .typewriter.typing::after { animation: none; opacity: 1; }
}