:root {
  /* Compliance phrases: IBM Plex Mono sparingly for token traces. Space Grotesk* Groteskk Grotesk** with heavy weights. */
  --null-black: #050509;
  --phosphor-doubt: #B7FF3C;
  --bruise-violet: #4B1D8F;
  --error-vermilion: #FF2A3D;
  --cold-paper: #E8E4D8;
  --static-cyan: #19D9FF;
  --fracture-x: 50vw;
  --density: 0.42;
  --space: "Space Grotesk", "Arial Narrow", system-ui, sans-serif;
  --spectral: Spectral, Georgia, serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  color: var(--cold-paper);
  background:
    radial-gradient(circle at 18% 12%, rgba(75, 29, 143, .34), transparent 28rem),
    radial-gradient(circle at 82% 72%, rgba(25, 217, 255, .14), transparent 26rem),
    var(--null-black);
  font-family: var(--spectral);
  overflow-x: hidden;
}

button { font: inherit; }

.grain,
.interference-field,
.logic-fracture {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 20;
}

.grain {
  opacity: .34;
  mix-blend-mode: screen;
  background-image:
    repeating-radial-gradient(circle at 21% 31%, rgba(232, 228, 216, .09) 0 1px, transparent 1px 4px),
    repeating-linear-gradient(0deg, transparent 0 4px, rgba(25, 217, 255, .035) 4px 5px);
}

.interference-field {
  opacity: calc(.14 + var(--density) * .28);
  background:
    repeating-linear-gradient(93deg, rgba(183,255,60,.08) 0 1px, transparent 1px 18px),
    repeating-linear-gradient(-7deg, rgba(255,42,61,.06) 0 1px, transparent 1px 26px);
  transform: translateX(calc((var(--fracture-x) - 50vw) * -.04));
  animation: fieldShiver 6s steps(8) infinite;
}

.logic-fracture {
  inset: 0 auto 0 var(--fracture-x);
  width: 1px;
  z-index: 30;
  background: linear-gradient(180deg, transparent, var(--static-cyan), var(--phosphor-doubt), var(--error-vermilion), transparent);
  box-shadow: 0 0 18px var(--phosphor-doubt), 12px 0 42px rgba(75,29,143,.5), -10px 0 28px rgba(25,217,255,.3);
  transform: translateX(-50%);
}

.logic-fracture span {
  position: absolute;
  top: 8vh;
  left: -5.5rem;
  width: 11rem;
  padding: .35rem .5rem;
  color: var(--phosphor-doubt);
  border: 1px solid rgba(183,255,60,.55);
  background: rgba(5,5,9,.76);
  font: 700 .68rem/1 var(--mono);
  letter-spacing: .24em;
  text-align: center;
}

.logic-fracture span::before { content: "LOGIC FRACTURE"; }
.logic-fracture::after {
  content: attr(data-label);
  position: absolute;
  bottom: 9vh;
  left: .7rem;
  writing-mode: vertical-rl;
  color: var(--static-cyan);
  font: 700 .62rem/1 var(--mono);
  letter-spacing: .35em;
}

.cursor-twin {
  position: fixed;
  width: 16px;
  height: 16px;
  border: 1px solid currentColor;
  z-index: 40;
  pointer-events: none;
  transform: translate(-50%, -50%) rotate(45deg);
  opacity: .75;
}

.cursor-yes { color: var(--phosphor-doubt); box-shadow: 0 0 15px currentColor; }
.cursor-no { color: var(--error-vermilion); width: 10px; height: 10px; }

.chamber {
  position: relative;
  min-height: 100vh;
  padding: clamp(5rem, 9vw, 9rem) clamp(1.25rem, 5vw, 6rem);
  display: grid;
  align-items: center;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid rgba(232,228,216,.12);
}

.chamber::before {
  content: attr(data-mode);
  position: absolute;
  right: -1.1rem;
  top: 8vh;
  color: rgba(232,228,216,.045);
  font: 800 clamp(5rem, 20vw, 18rem)/.8 var(--space);
  letter-spacing: -.08em;
  z-index: -1;
}

.section-tag,
.axis-mark,
.pane-label,
.token-trace,
.coordinates {
  font: 700 .72rem/1.4 var(--mono);
  letter-spacing: .18em;
  text-transform: uppercase;
}

.section-tag,
.axis-mark { color: var(--static-cyan); position: absolute; top: 2rem; left: 2rem; }

.brand-split {
  position: relative;
  justify-self: center;
  font: 800 clamp(4.3rem, 16vw, 16rem)/.82 var(--space);
  letter-spacing: -.095em;
  color: var(--cold-paper);
  filter: drop-shadow(0 0 28px rgba(232,228,216,.12));
}

.brand-main { position: relative; z-index: 2; }
.brand-copy {
  position: absolute;
  inset: 0;
  opacity: 0;
  z-index: 1;
}
.brand-copy.cyan { color: var(--static-cyan); transform: translate(-.08em, -.03em); }
.brand-copy.red { color: var(--error-vermilion); transform: translate(.08em, .045em); }
.is-split .brand-copy { opacity: .72; animation: brandTear .9s steps(3) both; }
.is-split .brand-main { text-shadow: 0 0 0 var(--phosphor-doubt); animation: mainSlice .9s steps(4) both; }

.opening-fragment {
  max-width: 44rem;
  margin: 2rem auto 0;
  text-align: center;
  color: rgba(232,228,216,.78);
  font-size: clamp(1.2rem, 2.3vw, 2rem);
}

.split-answer {
  justify-self: center;
  margin-top: 2rem;
  padding: 1rem 1.35rem;
  color: var(--phosphor-doubt);
  background: linear-gradient(90deg, rgba(183,255,60,.08), rgba(25,217,255,.04));
  border: 1px solid var(--phosphor-doubt);
  box-shadow: inset 0 0 18px rgba(183,255,60,.15), 0 0 30px rgba(183,255,60,.1);
  font-family: var(--mono);
  letter-spacing: .16em;
  text-transform: uppercase;
  cursor: pointer;
}

.split-answer:hover { background: var(--phosphor-doubt); color: var(--null-black); }

.subtitle-strip {
  position: absolute;
  bottom: 10vh;
  left: -3vw;
  width: 106vw;
  padding: .75rem;
  color: var(--null-black);
  background: var(--cold-paper);
  transform: rotate(-1.1deg);
  font: 800 .8rem/1 var(--mono);
  letter-spacing: .22em;
  white-space: nowrap;
  overflow: hidden;
}

.fork-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1rem, 9vw, 10rem);
  align-items: stretch;
}

.output-pane,
.final-panel {
  position: relative;
  min-height: 54vh;
  padding: clamp(1.2rem, 3vw, 3rem);
  border: 1px solid rgba(232,228,216,.18);
  background:
    linear-gradient(135deg, rgba(232,228,216,.06), transparent 42%),
    rgba(5,5,9,.68);
  box-shadow: 0 0 70px rgba(75,29,143,.25);
}

.yes-pane { transform: translateY(-4vh) rotate(-.45deg); border-color: rgba(183,255,60,.46); }
.no-pane { transform: translateY(5vh) rotate(.7deg); border-color: rgba(255,42,61,.48); }

.output-pane h1,
.proof-title,
.collapse-core h2,
.final-panel h2 {
  margin: 1.1rem 0;
  font: 800 clamp(2.8rem, 7.8vw, 8rem)/.86 var(--space);
  letter-spacing: -.075em;
}

.output-pane p,
.final-panel p {
  max-width: 36rem;
  color: rgba(232,228,216,.75);
  font-size: clamp(1.05rem, 1.65vw, 1.55rem);
}

.afterimage-type { position: relative; }
.afterimage-type::before,
.afterimage-type::after,
.collapse-core h2::before,
.collapse-core h2::after {
  content: attr(data-ghost);
  position: absolute;
  inset: 0;
  opacity: .38;
  pointer-events: none;
}
.afterimage-type::before { color: var(--static-cyan); transform: translate(-7px, -4px); }
.afterimage-type::after { color: var(--error-vermilion); transform: translate(7px, 5px); }

.pane-label { color: var(--phosphor-doubt); }
.token-trace { position: absolute; bottom: 1.2rem; color: var(--static-cyan); }

.waveform {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 8vh;
  width: 100%;
  height: 20vh;
  opacity: .9;
}
.waveform path { fill: none; stroke-width: 2; stroke-dasharray: 1500; stroke-dashoffset: 1500; animation: drawWave 5s linear infinite; }
.wave-a { stroke: var(--phosphor-doubt); filter: drop-shadow(0 0 8px var(--phosphor-doubt)); }
.wave-b { stroke: var(--error-vermilion); animation-delay: .5s; }

.chamber-proof { transform: skewY(-.35deg); }
.proof-title { max-width: 65rem; color: var(--cold-paper); }
.proof-wall {
  position: relative;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1rem;
  min-height: 58vh;
}
.proof-slip {
  position: relative;
  padding: 1.2rem;
  color: var(--null-black);
  background: var(--cold-paper);
  box-shadow: 12px 18px 0 rgba(75,29,143,.6), 0 0 45px rgba(232,228,216,.08);
}
.proof-slip span { font: 800 .7rem/1 var(--mono); letter-spacing: .18em; text-transform: uppercase; }
.proof-slip p { font: 1.5rem/1.15 var(--spectral); }
.slip-one { grid-column: 1 / 6; transform: rotate(-2deg); }
.slip-two { grid-column: 6 / 11; transform: translateY(7vh) rotate(1.5deg); }
.slip-three { grid-column: 3 / 8; transform: translateY(-1vh) rotate(.6deg); }
.mujun-stamp {
  display: inline-block;
  padding: .35rem .5rem;
  color: var(--error-vermilion);
  border: 2px solid currentColor;
  font: 900 .8rem/1 var(--mono);
  letter-spacing: .12em;
  transform: rotate(-8deg);
}
.mujun-stamp.violet { color: var(--bruise-violet); }
.mujun-stamp.cyan { color: var(--static-cyan); }
.rebuttal-ghost {
  position: absolute;
  right: 2vw;
  top: 28%;
  color: rgba(255,42,61,.2);
  font: 900 clamp(4rem, 11vw, 12rem)/.8 var(--space);
  letter-spacing: -.08em;
  writing-mode: vertical-rl;
}
.redaction-lane { position: absolute; inset: auto 10vw 12vh 10vw; height: 8rem; }
.redaction-lane span {
  position: absolute;
  height: 1.15rem;
  background: var(--null-black);
  box-shadow: 0 0 0 1px rgba(255,42,61,.5);
  animation: redact 4.5s linear infinite;
}
.redaction-lane span:nth-child(1) { width: 42%; top: 0; left: 8%; }
.redaction-lane span:nth-child(2) { width: 30%; top: 2.8rem; left: 39%; animation-delay: -1.3s; }
.redaction-lane span:nth-child(3) { width: 55%; top: 5.5rem; left: 17%; animation-delay: -2.4s; }

.chamber-collapse {
  background:
    radial-gradient(circle at 50% 50%, rgba(255,42,61,.18), transparent 18rem),
    repeating-conic-gradient(from 0deg at 50% 50%, rgba(183,255,60,.08) 0deg 3deg, transparent 3deg 8deg),
    var(--null-black);
}
.collapse-core {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
}
.collapse-core h2 { position: relative; margin: 0; color: var(--cold-paper); text-align: center; }
.collapse-core h2::before { content: attr(data-text); color: var(--static-cyan); transform: translate(-10px, -6px); }
.collapse-core h2::after { content: attr(data-text); color: var(--error-vermilion); transform: translate(10px, 6px); }
.bracket {
  color: var(--phosphor-doubt);
  font: 900 clamp(8rem, 24vw, 24rem)/.65 var(--space);
  animation: bracketSnap 2.8s steps(2) infinite;
}
.right-bracket { animation-delay: .4s; }
.scanner-bars i {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--static-cyan);
  box-shadow: 0 0 20px var(--static-cyan);
  animation: scan 4s linear infinite;
}
.scanner-bars i:nth-child(2) { animation-delay: -1s; background: var(--phosphor-doubt); }
.scanner-bars i:nth-child(3) { animation-delay: -2.4s; background: var(--error-vermilion); }
.scanner-bars i:nth-child(4) { animation-delay: -3.1s; }
.punctuation-bloom {
  position: absolute;
  bottom: 7vh;
  left: 5vw;
  color: rgba(183,255,60,.18);
  font: 900 clamp(4rem, 13vw, 15rem)/1 var(--space);
  animation: pulseBloom 2.7s steps(3) infinite;
}

.chamber-afterimage {
  justify-items: center;
  background:
    linear-gradient(90deg, rgba(25,217,255,.06), transparent 49%, rgba(183,255,60,.08) 50%, transparent 51%, rgba(255,42,61,.06)),
    var(--null-black);
}
.final-panel {
  width: min(70rem, 92vw);
  min-height: 55vh;
  display: grid;
  align-content: center;
  border-color: rgba(232,228,216,.32);
}
.dual-mask {
  display: flex;
  margin-top: 2rem;
  border: 1px solid rgba(232,228,216,.2);
  font: 900 clamp(3rem, 12vw, 12rem)/.9 var(--space);
}
.dual-mask span { flex: 1; padding: 1rem; text-align: center; }
.dual-mask span:first-child { color: var(--phosphor-doubt); background: rgba(183,255,60,.08); }
.dual-mask span:last-child { color: var(--error-vermilion); background: rgba(255,42,61,.08); }
.coordinates { position: absolute; bottom: 2rem; right: 2rem; color: var(--static-cyan); }

.static-pane::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(0deg, transparent 0 6px, rgba(232,228,216,.04) 6px 7px);
  mix-blend-mode: screen;
}

@keyframes fieldShiver { 50% { transform: translateX(calc((var(--fracture-x) - 50vw) * -.06)) skewX(.6deg); } }
@keyframes brandTear { 0% { clip-path: inset(0 0 100% 0); } 42% { clip-path: inset(12% 0 44% 0); } 100% { clip-path: inset(0 0 0 0); } }
@keyframes mainSlice { 45% { transform: skewX(-8deg); } 100% { transform: skewX(0); } }
@keyframes drawWave { 0% { stroke-dashoffset: 1500; } 65%, 100% { stroke-dashoffset: 0; } }
@keyframes redact { 50% { transform: translateX(7vw) scaleX(.62); } }
@keyframes bracketSnap { 50% { transform: translateX(1.1rem); color: var(--static-cyan); } }
@keyframes scan { from { top: -5vh; } to { top: 105vh; } }
@keyframes pulseBloom { 50% { opacity: .45; transform: scale(1.03) skewX(-6deg); } }

@media (max-width: 820px) {
  .fork-grid { grid-template-columns: 1fr; gap: 2rem; }
  .yes-pane, .no-pane { transform: none; min-height: 44vh; }
  .proof-wall { display: block; }
  .proof-slip { margin: 1rem 0; transform: none; }
  .collapse-core { grid-template-columns: 1fr; }
  .bracket { display: none; }
  .section-tag, .axis-mark { left: 1rem; }
}