:root {
  --abyss: #0a1628;
  --hadal: #0f2030;
  --teal: #00b4d8;
  --coral: #ff6b81;
  --aqua: #a8e6cf;
  --pearl: #b8c5d6;
  --deep-teal: #0d3b4f;
  --lavender: #b388ff;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Compliance vocabulary: Interior | Space Only* Only Only: Only:: Unlike typical backgrounds that uniformly frame the particle viewport. */

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--abyss);
  color: var(--pearl);
  font-family: "Karla", Arial, sans-serif;
  letter-spacing: 0.03em;
  overflow-x: hidden;
}

#particle-field {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.glitch-layer {
  position: relative;
  z-index: 1;
  background-image:
    linear-gradient(90deg, rgba(13,59,79,0.16) 1px, transparent 1px),
    linear-gradient(0deg, rgba(13,59,79,0.10) 1px, transparent 1px);
  background-size: 11vw 11vw;
}
.glitch-layer::before,
.glitch-layer::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
  opacity: 0;
  mix-blend-mode: screen;
}
.glitch-layer::before { background: rgba(255,107,129,0.28); transform: translateX(-3px); }
.glitch-layer::after { background: rgba(0,180,216,0.28); transform: translateX(3px); }
.glitch-layer.glitching { animation: viewportGlitch 150ms steps(2, end); }
.glitch-layer.glitching::before,
.glitch-layer.glitching::after { opacity: 1; animation: splitFlash 150ms steps(1, end); }

.intro {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: var(--abyss);
}
.brand {
  margin: 0;
  font-family: "Caveat", cursive;
  font-weight: 700;
  font-size: clamp(4rem, 14vw, 13rem);
  color: var(--aqua);
  letter-spacing: 0.01em;
  line-height: 1;
}
.letters span {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.2em);
  animation: letterIn 600ms var(--ease) forwards;
}
.letters span:nth-child(1) { animation-delay: 0ms; }
.letters span:nth-child(2) { animation-delay: 200ms; }
.letters span:nth-child(3) { animation-delay: 400ms; }
.letters span:nth-child(4) { animation-delay: 600ms; }
.letters span:nth-child(5) { animation-delay: 800ms; }
.letters span:nth-child(6) { animation-delay: 1000ms; }
.letters span:nth-child(7) { animation-delay: 1200ms; }
.extension {
  opacity: 0;
  color: var(--teal);
  text-shadow: 0 0 18px rgba(0,180,216,0.65);
  animation: extensionIn 900ms var(--ease) 2000ms forwards, glowPulse 1800ms var(--ease) 2900ms 2;
}

.proof-scroll {
  min-height: 400vh;
  padding: 10vh 4vw 18vh;
}
.mosaic {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: minmax(80px, auto);
  gap: 2px;
  min-height: 100vh;
  margin: 0 auto 12vh;
  max-width: 1560px;
  background: rgba(13,59,79,0.40);
  box-shadow: 0 0 32px rgba(13,59,79,0.24);
}
.module {
  position: relative;
  overflow: hidden;
  background: var(--hadal);
  opacity: 0;
  transform: translateY(52px);
  transition: opacity 600ms var(--ease), transform 600ms var(--ease), border-color 500ms var(--ease);
  border: 1px solid rgba(0,180,216,0.10);
}
.module.visible { opacity: 1; transform: translateY(0); }
.module p { margin: 0; }
.thesis {
  display: flex;
  align-items: center;
  padding: clamp(1.5rem, 4vw, 4rem);
}
.thesis p {
  max-width: 12ch;
  font-family: "Caveat", cursive;
  font-weight: 700;
  font-size: clamp(2.4rem, 5.5vw, 4.8rem);
  color: var(--aqua);
  letter-spacing: 0.01em;
  line-height: 1.25;
}
.note {
  padding: clamp(1.2rem, 2.8vw, 2.6rem);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 1.2rem;
  font-size: clamp(0.9rem, 1.4vw, 1.1rem);
  line-height: 1.7;
}
.label, .axis a {
  font-family: "Architects Daughter", cursive;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--teal);
  font-size: clamp(0.7rem, 1vw, 0.85rem);
}
.axiom {
  display: grid;
  place-items: center;
  border-color: rgba(168,230,207,0.18);
}
.axiom p {
  width: max-content;
  transform: rotate(-90deg);
  color: var(--pearl);
  font-size: clamp(0.9rem, 1.4vw, 1.1rem);
  line-height: 1.7;
  text-transform: uppercase;
}
.proof { padding: 1.4rem; display: grid; align-items: center; }
.proof .label { align-self: start; }
.curve { width: 100%; height: 100%; min-height: 180px; }
.draw-path, .glow-path {
  fill: none;
  stroke-width: 3.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: url(#glow-teal);
}
.glow-path { opacity: 0.35; stroke-width: 9; }
.teal { stroke: var(--teal); }
.coral { stroke: var(--coral); }
.lavender { stroke: var(--lavender); }
.window { display: grid; place-items: center; perspective: 700px; }
.porthole {
  width: min(76%, 360px);
  aspect-ratio: 1;
  border: 1px solid rgba(0,180,216,0.72);
  border-radius: 50%;
  position: relative;
  transform-style: preserve-3d;
  animation: slowRotate 18s linear infinite;
}
.porthole::before, .porthole::after, .porthole i {
  content: "";
  position: absolute;
  inset: 16%;
  border: 1px solid rgba(0,180,216,0.68);
  transform: rotate(var(--r, 0deg)) translateZ(var(--z, 0px));
}
.porthole::after { inset: 30%; --r: 45deg; border-color: rgba(179,136,255,0.55); }
.porthole i:nth-child(1) { --r: 15deg; --z: 30px; }
.porthole i:nth-child(2) { --r: 60deg; --z: -20px; border-radius: 50%; }
.porthole i:nth-child(3) { --r: 105deg; --z: 50px; }
.porthole i:nth-child(4) { --r: 150deg; --z: -40px; border-color: rgba(255,107,129,0.45); }
.porthole i:nth-child(5) { --r: 210deg; --z: 20px; border-radius: 50%; }
.porthole i:nth-child(6) { --r: 280deg; --z: 70px; }
.rupture {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2rem, 5vw, 5rem);
  background: var(--hadal);
}
.rupture p {
  font-family: "Caveat", cursive;
  font-size: clamp(4rem, 9vw, 9rem);
  color: var(--coral);
  line-height: 1;
  text-shadow: 0 0 20px rgba(255,107,129,0.42);
}
.rupture small { max-width: 54ch; color: var(--pearl); font-size: clamp(0.9rem, 1.4vw, 1.1rem); line-height: 1.7; }
.rupture.active { animation: rupturePulse 800ms steps(4, end); }
.final-thesis { justify-content: center; text-align: center; }
.final-thesis p { max-width: 15ch; }

.m-a1 { grid-column: 2 / span 8; grid-row: 1 / span 3; }
.m-a2 { grid-column: 10 / span 2; grid-row: 1 / span 6; }
.m-a3 { grid-column: 3 / span 4; grid-row: 4 / span 3; }
.m-a4 { grid-column: 7 / span 4; grid-row: 5 / span 3; }
.m-b1 { grid-column: 2 / span 3; grid-row: 1 / span 5; }
.m-b2 { grid-column: 5 / span 6; grid-row: 1 / span 3; }
.m-b3 { grid-column: 4 / span 7; grid-row: 4 / span 2; }
.m-b4 { grid-column: 6 / span 4; grid-row: 6 / span 3; }
.m-b5 { grid-column: 10 / span 2; grid-row: 4 / span 5; }
.m-c1 { grid-column: 2 / span 10; grid-row: 1 / span 3; }
.m-c2 { grid-column: 2 / span 4; grid-row: 4 / span 4; }
.m-c3 { grid-column: 6 / span 4; grid-row: 4 / span 3; }
.m-c4 { grid-column: 9 / span 3; grid-row: 6 / span 4; }
.m-d1 { grid-column: 2 / span 3; grid-row: 1 / span 3; }
.m-d2 { grid-column: 4 / span 6; grid-row: 3 / span 3; }
.m-d3 { grid-column: 3 / span 8; grid-row: 6 / span 3; }

.axis {
  position: fixed;
  left: 8vw;
  right: 8vw;
  bottom: 8vh;
  z-index: 100;
  height: 46px;
  mix-blend-mode: screen;
  opacity: 0;
  transform: translateY(12px);
  animation: axisIn 1000ms var(--ease) 3000ms forwards;
}
.axis-line { position: absolute; left: 0; right: 0; top: 10px; height: 1px; background: var(--teal); }
.axis-marker {
  position: absolute;
  top: -6px;
  left: 0;
  width: 13px;
  height: 13px;
  border: 1px solid var(--teal);
  border-radius: 50%;
  background: var(--abyss);
  box-shadow: 0 0 12px rgba(0,180,216,0.8);
  transition: left 450ms var(--ease), border-color 450ms var(--ease), box-shadow 450ms var(--ease);
}
.axis.proven .axis-marker { border-color: var(--lavender); box-shadow: 0 0 26px rgba(179,136,255,0.95); }
.axis a {
  position: absolute;
  top: 22px;
  text-decoration: none;
}
.axis a:nth-of-type(1) { left: 0; }
.axis a:nth-of-type(2) { left: 31%; }
.axis a:nth-of-type(3) { left: 64%; }
.axis a:nth-of-type(4) { right: 0; }

@keyframes letterIn { to { opacity: 1; transform: translateY(0); } }
@keyframes extensionIn { to { opacity: 1; } }
@keyframes glowPulse { 50% { text-shadow: 0 0 38px rgba(0,180,216,1); } }
@keyframes axisIn { to { opacity: 1; transform: translateY(0); } }
@keyframes viewportGlitch { 0%,100%{transform:translateX(0)} 25%{transform:translateX(4px)} 50%{transform:translateX(-3px)} 75%{transform:translateX(2px)} }
@keyframes splitFlash { 0%,100%{opacity:0.3} 50%{opacity:0.05} }
@keyframes slowRotate { to { transform: rotateY(360deg) rotateZ(360deg); } }
@keyframes rupturePulse { 0%,100%{background:var(--hadal)} 25%,75%{background:#2b1b2b; transform:translateX(3px)} 50%{background:#331726; transform:translateX(-4px)} }

@media (max-width: 760px) {
  .proof-scroll { padding-inline: 5vw; }
  .mosaic { display: block; background: transparent; box-shadow: none; min-height: auto; }
  .module { min-height: 260px; margin-bottom: 2px; }
  .axiom { min-height: 360px; }
  .axis { left: 5vw; right: 5vw; }
}