:root {
  --paper: #070810;
  --paper-bright: #0d111b;
  --ink: #f4f7fb;
  --muted: #9ca8b8;
  --line: rgba(255, 255, 255, .24);
  --line-soft: rgba(255, 255, 255, .11);
  --crimson: #ff3bc8;
  --crimson-ink: #ff86df;
  --cyan: #35e7ff;
  --amber: #ffb703;
  --serif: Georgia, "Times New Roman", serif;
  --sans: Arial, Helvetica, sans-serif;
  --condensed: "Arial Narrow", Arial, Helvetica, sans-serif;
  --mono: "Courier New", monospace;
}

* { box-sizing: border-box; }
html { height: 100%; background: var(--paper); }
body {
  margin: 0;
  min-height: 100%;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; cursor: pointer; }
a { color: inherit; text-decoration: none; }
::selection { background: var(--crimson); color: #070810; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 4px; }

.skip-link {
  position: fixed;
  left: 18px;
  top: -80px;
  z-index: 100;
  padding: 12px 16px;
  background: var(--ink);
  color: var(--paper);
}
.skip-link:focus { top: 12px; }

.intro {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 50% 50%, rgba(53, 231, 255, .08), transparent 28%),
    var(--paper);
  transition: opacity .75s ease, visibility .75s;
}
.intro::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .24;
  background-image: radial-gradient(rgba(255, 255, 255, .38) 0.45px, transparent 0.45px);
  background-size: 5px 5px;
}
.intro-mark {
  position: relative;
  display: flex;
  align-items: center;
  gap: 13px;
  font: 800 25px/1 var(--sans);
  letter-spacing: .16em;
  opacity: 0;
  transform: translateY(12px);
  animation: intro-mark .7s .25s forwards;
}
.intro-count {
  position: absolute;
  left: 4vw;
  right: 4vw;
  bottom: 4vh;
  display: flex;
  align-items: center;
  gap: 18px;
  font: 12px var(--mono);
}
.intro-count i {
  display: block;
  height: 1px;
  flex: 1;
  background: linear-gradient(90deg, var(--cyan), var(--crimson));
  transform: scaleX(0);
  transform-origin: left;
  animation: intro-line 1.25s .15s forwards cubic-bezier(.2, .7, .2, 1);
}
body.ready .intro { opacity: 0; visibility: hidden; pointer-events: none; }
@keyframes intro-mark { to { opacity: 1; transform: none; } }
@keyframes intro-line { to { transform: scaleX(1); } }

.topbar {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  height: 66px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 3.5vw;
  border-bottom: 1px solid var(--line-soft);
  background: rgba(6, 8, 16, .76);
  backdrop-filter: blur(20px) saturate(1.25);
}
.wordmark {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  gap: 10px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .14em;
}
.chapter-nav { display: flex; align-items: center; gap: 25px; }
.chapter-nav button, .plain-button {
  border: 0;
  padding: 8px 0;
  background: none;
  font-size: 12px;
  line-height: 1;
}
.chapter-nav button {
  color: #8590a0;
  position: relative;
}
.chapter-nav button::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), var(--crimson));
  transition: right .35s ease;
}
.chapter-nav button.active { color: var(--ink); }
.chapter-nav button.active::after { right: 0; }
.top-actions {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 30px;
}
.location {
  font: 8px/1 var(--mono);
  letter-spacing: .08em;
  color: var(--muted);
}
.plain-button span { margin-left: 16px; color: var(--cyan); font-size: 17px; }

.experience, .stage { width: 100%; height: 100svh; }
.stage {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background:
    radial-gradient(circle at 74% 42%, rgba(38, 33, 99, .18), transparent 34%),
    var(--paper);
}
.paper-noise {
  position: absolute;
  inset: 0;
  z-index: -3;
  pointer-events: none;
  opacity: .2;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(53, 231, 255, .22) 0 .5px, transparent .7px),
    radial-gradient(circle at 70% 60%, rgba(255, 59, 200, .3) 0 .6px, transparent .8px);
  background-size: 4px 4px, 5px 5px;
  mix-blend-mode: screen;
}
.coordinate-grid {
  position: absolute;
  inset: 66px 0 0;
  z-index: -2;
  pointer-events: none;
  opacity: .14;
  background-image:
    linear-gradient(90deg, transparent calc(25% - .5px), var(--cyan) 25%, transparent calc(25% + .5px)),
    linear-gradient(90deg, transparent calc(75% - .5px), var(--crimson) 75%, transparent calc(75% + .5px)),
    linear-gradient(transparent calc(50% - .5px), rgba(255,255,255,.65) 50%, transparent calc(50% + .5px));
}

.cursor-aurora {
  position: absolute;
  inset: 66px 0 0;
  z-index: 2;
  pointer-events: none;
  opacity: .5;
  background: radial-gradient(340px circle at var(--cursor-x, 68%) var(--cursor-y, 45%), rgba(53, 231, 255, .09), transparent 68%);
  transition: opacity .3s ease;
}

.board-viewport {
  position: absolute;
  inset: 66px 0 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}
.board-viewport::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 62% 44%, transparent 10%, rgba(4, 5, 12, .08) 43%, rgba(4, 5, 12, .66) 100%),
    linear-gradient(90deg, rgba(5, 7, 14, .96) 0, rgba(5, 7, 14, .76) 26%, transparent 51%),
    linear-gradient(0deg, rgba(5, 7, 14, .78), transparent 20%, transparent 82%, rgba(5, 7, 14, .54));
}
.board-camera {
  position: absolute;
  left: 0;
  top: 0;
  width: min(102vw, 1560px);
  aspect-ratio: 3 / 2;
  transform-origin: 0 0;
  will-change: transform;
  transition: transform 1.15s cubic-bezier(.2, .78, .2, 1);
}
.board-art {
  position: relative;
  width: 100%;
  height: 100%;
  transform: translate3d(var(--parallax-x, 0), var(--parallax-y, 0), 0) scale(1.015);
  transform-origin: center;
  transition: transform .32s ease-out;
  will-change: transform;
}
.motherboard {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: saturate(1.08) contrast(1.06) drop-shadow(0 40px 60px rgba(0, 0, 0, .38));
  user-select: none;
}
.board-marker {
  position: absolute;
  z-index: 2;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, .8);
  border-radius: 50%;
  background: rgba(7, 9, 18, .68);
  color: #fff;
  font: 8px var(--mono);
  box-shadow: 0 0 0 7px rgba(7, 9, 18, .18), 0 0 25px rgba(53, 231, 255, .18);
  pointer-events: auto;
  transition: background .3s, color .3s, transform .5s, box-shadow .3s;
}
.board-marker::before {
  content: "";
  position: absolute;
  inset: -10px;
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 50%;
  animation: marker-pulse 2.7s ease-out infinite;
}
.board-marker small {
  position: absolute;
  top: 45px;
  left: 50%;
  padding: 5px 7px;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 4px;
  background: rgba(4, 6, 13, .76);
  color: rgba(255,255,255,.82);
  font: 7px var(--mono);
  letter-spacing: .06em;
  text-transform: uppercase;
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity .2s, transform .2s;
  white-space: nowrap;
}
.board-marker:hover small, .board-marker:focus-visible small { opacity: 1; transform: translate(-50%, 2px); }
.board-marker.active {
  border-color: var(--cyan);
  background: linear-gradient(135deg, var(--cyan), var(--crimson));
  color: #05070e;
  transform: scale(1.15);
  box-shadow: 0 0 0 7px rgba(53, 231, 255, .12), 0 0 34px rgba(53, 231, 255, .56);
}
.marker-1 { left: 62%; top: 43%; }
.marker-2 { left: 20%; top: 43%; }
.marker-3 { left: 83%; top: 71%; }

.signal-map {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
  filter: drop-shadow(0 0 7px currentColor);
  mix-blend-mode: screen;
}
.signal {
  fill: none;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-dasharray: .018 .045;
  animation: signal-flow 3.8s linear infinite;
  opacity: .78;
}
.signal-cyan { color: var(--cyan); stroke: var(--cyan); }
.signal-pink { color: var(--crimson); stroke: var(--crimson); animation-duration: 4.6s; }
.signal-delay { animation-delay: -2.1s; opacity: .48; }
@keyframes signal-flow { to { stroke-dashoffset: -1; } }
@keyframes marker-pulse { 0%, 30% { opacity: .55; transform: scale(.72); } 75%, 100% { opacity: 0; transform: scale(1.45); } }

.scene-copy {
  position: absolute;
  z-index: 5;
  left: 3.5vw;
  top: clamp(118px, 16vh, 165px);
  width: min(458px, 35vw);
  padding: 25px 27px 23px;
  border: 1px solid rgba(255, 255, 255, .15);
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(10, 13, 25, .9), rgba(6, 9, 18, .65));
  box-shadow: 0 24px 70px rgba(0, 0, 0, .34), inset 0 1px 0 rgba(255, 255, 255, .07);
  backdrop-filter: blur(20px) saturate(1.24);
  transition: opacity .25s ease, transform .25s ease;
}
.scene-copy.changing { opacity: 0; transform: translateY(9px); }
.scene-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 23px;
  color: var(--muted);
  font: 9px/1 var(--mono);
  letter-spacing: .09em;
}
.scene-kicker > span:first-child { color: var(--ink); }
.scene-kicker i { width: 27px; height: 1px; background: linear-gradient(90deg, var(--cyan), var(--crimson)); }
h1 {
  margin: 0;
  font: 400 clamp(48px, 5vw, 76px)/.88 var(--serif);
  letter-spacing: -.055em;
}
h1 em {
  color: var(--cyan);
  font-style: normal;
  background: linear-gradient(95deg, var(--cyan), #a9f7ff 38%, var(--crimson) 92%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.scene-lead {
  max-width: 400px;
  margin: 27px 0 25px;
  color: #c0c8d4;
  font-size: 15px;
  line-height: 1.65;
}
.scene-meta { margin: 0; border-top: 1px solid var(--line); }
.scene-meta div {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 15px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line-soft);
}
.scene-meta dt {
  color: #8794a6;
  font: 8px/1.5 var(--mono);
  letter-spacing: .07em;
}
.scene-meta dd { margin: 0; font-size: 12px; line-height: 1.3; }
.scope-button {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  margin-top: 19px;
  padding: 12px 0;
  border: 0;
  border-bottom: 1px solid rgba(255,255,255,.5);
  background: none;
  text-align: left;
  font-size: 12px;
}
.scope-button span {
  color: var(--cyan);
  font-size: 22px;
  transition: transform .25s;
}
.scope-button:hover span { transform: rotate(45deg); }

.position-index {
  position: absolute;
  z-index: 4;
  right: 3.5vw;
  top: 25vh;
  width: 172px;
  padding: 18px 16px;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 14px;
  background: rgba(7, 10, 19, .58);
  box-shadow: 0 18px 50px rgba(0,0,0,.25), inset 0 1px rgba(255,255,255,.06);
  backdrop-filter: blur(16px);
}
.position-index > p {
  margin: 0 0 13px 37px;
  color: var(--muted);
  font: 8px var(--mono);
  letter-spacing: .1em;
}
.position-index ol { list-style: none; margin: 0; padding: 0; }
.position-index button {
  display: grid;
  grid-template-columns: 28px 1fr;
  width: 100%;
  padding: 8px 0;
  border: 0;
  background: none;
  color: #8792a3;
  text-align: left;
  font-size: 11px;
}
.position-index button span { font: 8px var(--mono); padding-top: 2px; }
.position-index button.active { color: var(--ink); }
.position-index button.active::after {
  content: "";
  align-self: center;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan), var(--crimson));
  box-shadow: 0 0 12px var(--cyan);
}

.system-note {
  position: absolute;
  z-index: 3;
  top: 91px;
  left: 50%;
  right: 3.5vw;
  display: flex;
  align-items: center;
  gap: 12px;
  color: #8e99aa;
  font: 8px var(--mono);
  letter-spacing: .08em;
}
.system-line { height: 1px; flex: 1; background: var(--line); }
.stage-controls {
  position: absolute;
  z-index: 7;
  right: 3.5vw;
  bottom: 3.2vh;
  display: flex;
  align-items: center;
  gap: 12px;
}
.stage-controls button {
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(7, 10, 19, .7);
  backdrop-filter: blur(12px);
  font-size: 18px;
  transition: background .2s, color .2s;
}
.stage-controls button:hover { border-color: var(--cyan); background: rgba(53,231,255,.13); color: var(--cyan); }
.stage-controls > span { min-width: 42px; font: 9px var(--mono); text-align: center; }
.scene-progress { width: 90px; height: 1px; background: var(--line); overflow: hidden; }
.scene-progress i {
  display: block;
  width: 20%;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--crimson));
  transform-origin: left;
  transition: width .65s ease;
}
.interaction-hint {
  position: absolute;
  z-index: 6;
  left: 3.5vw;
  bottom: 3.7vh;
  margin: 0;
  color: #8e99aa;
  font: 8px var(--mono);
  letter-spacing: .08em;
}
.interaction-hint span { color: var(--ink); }
.sr-status {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
}

dialog {
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(11, 14, 24, .96);
  box-shadow: 0 35px 120px rgba(0,0,0,.6), inset 0 1px rgba(255,255,255,.07);
  padding: 0;
  scrollbar-width: thin;
  scrollbar-color: rgba(53,231,255,.5) rgba(255,255,255,.04);
}
dialog::-webkit-scrollbar, .scope-layout::-webkit-scrollbar { width: 5px; }
dialog::-webkit-scrollbar-track, .scope-layout::-webkit-scrollbar-track { background: rgba(255,255,255,.04); }
dialog::-webkit-scrollbar-thumb, .scope-layout::-webkit-scrollbar-thumb { border-radius: 5px; background: linear-gradient(var(--cyan), var(--crimson)); }
.scope-layout { scrollbar-width: thin; scrollbar-color: rgba(53,231,255,.5) rgba(255,255,255,.04); }
dialog::backdrop {
  background: rgba(2, 3, 8, .76);
  backdrop-filter: blur(14px);
}
.scope-dialog {
  width: min(1160px, 94vw);
  max-height: 92svh;
  overflow: hidden;
}
.dialog-topline {
  height: 56px;
  padding: 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line-soft);
  font: 8px var(--mono);
  letter-spacing: .08em;
}
.dialog-topline button {
  border: 0;
  background: none;
  font-size: 11px;
}
.dialog-topline b { margin-left: 11px; font-size: 20px; font-weight: 400; }
.scope-layout {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  max-height: calc(92svh - 57px);
  overflow: auto;
}
.scope-visual {
  position: sticky;
  top: 0;
  min-height: 640px;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: #03050b;
}
.scope-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, transparent 40%, rgba(0, 0, 0, .45));
}
.scope-visual img {
  width: 125%;
  max-width: none;
  filter: saturate(1.08) contrast(1.05) drop-shadow(0 22px 35px #000);
}
.scope-visual span {
  position: absolute;
  z-index: 2;
  left: 24px;
  bottom: 22px;
  color: #dce8f4;
  font: 8px var(--mono);
  letter-spacing: .1em;
}
.scope-content { padding: 48px 43px 42px; }
.dialog-eyebrow {
  margin: 0 0 18px;
  color: var(--crimson-ink);
  font: 9px var(--mono);
  letter-spacing: .1em;
}
.scope-content h2, .brief-heading h2 {
  margin: 0;
  font: 400 clamp(42px, 4vw, 61px)/.92 var(--serif);
  letter-spacing: -.05em;
}
.dialog-lead, .brief-heading > p:last-child {
  margin: 25px 0 30px;
  color: #b6c0cf;
  font-size: 15px;
  line-height: 1.7;
}
.scope-content h3 {
  margin: 27px 0 10px;
  color: #8492a5;
  font: 8px var(--mono);
  letter-spacing: .1em;
}
.scope-content ul { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.scope-content li {
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.45;
}
.scope-content li::before { content: "+"; margin-right: 12px; color: var(--crimson); }
.deliverable {
  margin: 26px 0;
  padding: 17px 18px;
  border-left: 2px solid var(--cyan);
  background: rgba(53, 231, 255, .07);
}
.deliverable small { display: block; margin-bottom: 7px; font: 8px var(--mono); color: #8996a9; }
.deliverable p { margin: 0; font-size: 13px; line-height: 1.6; }
.company-link {
  display: inline-block;
  margin: 8px 0 25px;
  border-bottom: 1px solid var(--ink);
  font-size: 12px;
  padding-bottom: 4px;
}
.dialog-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 15px 17px;
  border: 0;
  border: 1px solid rgba(255,255,255,.15);
  background: linear-gradient(115deg, rgba(53,231,255,.18), rgba(255,59,200,.2));
  color: var(--ink);
  font-size: 12px;
}
.dialog-action:hover { border-color: var(--cyan); background: linear-gradient(115deg, var(--cyan), var(--crimson)); color: #05070e; }
.dialog-action span { font-size: 18px; }
.availability {
  margin: 15px 0 0;
  color: #8995a7;
  font: 8px/1.5 var(--mono);
}

.brief-dialog {
  width: min(980px, 94vw);
  max-height: 92svh;
  overflow: auto;
}
.brief-dialog form {
  display: grid;
  grid-template-columns: .88fr 1.12fr;
  gap: 56px;
  padding: 45px 45px 38px;
}
.brief-heading { align-self: start; position: sticky; top: 25px; }
.brief-fields { display: grid; gap: 17px; }
.brief-fields > label, .field-row label {
  display: grid;
  gap: 8px;
  color: #98a5b6;
  font: 9px var(--mono);
  letter-spacing: .06em;
}
input, select, textarea {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  color-scheme: dark;
  padding: 11px 0;
  font: 14px var(--sans);
}
textarea { resize: vertical; min-height: 72px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
fieldset { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; border: 0; padding: 0; margin: 2px 0; }
legend {
  grid-column: 1 / -1;
  width: 100%;
  margin-bottom: 9px;
  color: #98a5b6;
  font: 9px var(--mono);
  letter-spacing: .06em;
}
.check {
  position: relative;
  min-height: 45px;
  display: flex;
  align-items: center;
  border: 1px solid var(--line-soft);
  padding: 10px 12px;
  cursor: pointer;
}
.check input { position: absolute; opacity: 0; width: 1px; }
.check span { font-size: 12px; }
.check:has(input:checked) { border-color: var(--cyan); background: linear-gradient(115deg, rgba(53,231,255,.18), rgba(255,59,200,.17)); color: var(--ink); }
.check:has(input:focus-visible) { outline: 2px solid var(--crimson); outline-offset: 2px; }
.form-error { min-height: 15px; margin: -4px 0 0; color: #ff7ca5; font-size: 12px; }
.download-status { margin: -7px 0 0; color: #b6c0cf; font-size: 12px; line-height: 1.5; }
.local-note { margin: 0; color: #8794a6; text-align: center; font: 8px var(--mono); letter-spacing: .08em; }

.noscript { padding: 130px 8vw; }
.noscript h1 { margin-bottom: 25px; }
.noscript p { max-width: 580px; font-size: 17px; line-height: 1.7; }
.noscript a { border-bottom: 1px solid var(--ink); }

@media (max-width: 1000px) {
  .location { display: none; }
  .position-index { display: none; }
  .scene-copy { width: min(440px, 42vw); }
  .board-camera { width: 112vw; }
}

@media (max-width: 760px) {
  body { overflow: hidden; }
  .intro-mark { font-size: 20px; }
  .topbar {
    height: 58px;
    grid-template-columns: 1fr auto;
    padding: 0 18px;
  }
  .wordmark { font-size: 14px; gap: 8px; }
  .wordmark img { width: 22px; height: 22px; }
  .chapter-nav { display: none; }
  .plain-button { font-size: 11px; }
  .plain-button span { margin-left: 8px; }
  .board-viewport {
    inset: 58px 0 auto;
    height: 44svh;
  }
  .board-viewport::after {
    background:
      radial-gradient(circle at 62% 44%, transparent 8%, rgba(4,5,12,.04) 40%, rgba(4,5,12,.42) 100%),
      linear-gradient(0deg, var(--paper) 0, transparent 22%, transparent 84%, rgba(4,5,12,.34)),
      linear-gradient(90deg, rgba(4,5,12,.28), transparent 15%, transparent 85%, rgba(4,5,12,.28));
  }
  .board-camera { width: 760px; }
  .coordinate-grid {
    inset: 58px 0 auto;
    height: 44svh;
    background-image:
      linear-gradient(90deg, transparent calc(50% - .5px), var(--cyan) 50%, transparent calc(50% + .5px)),
      linear-gradient(transparent calc(50% - .5px), rgba(255,255,255,.5) 50%, transparent calc(50% + .5px));
  }
  .cursor-aurora { display: none; }
  .scene-copy {
    left: 0;
    top: 44svh;
    width: 100%;
    height: calc(56svh - 64px);
    overflow-y: auto;
    padding: 22px 22px 28px;
    border-top: 1px solid var(--line-soft);
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 0;
    background: linear-gradient(180deg, rgba(9,12,22,.98), var(--paper));
    box-shadow: 0 -16px 45px rgba(0,0,0,.34);
    scrollbar-width: thin;
    scrollbar-color: rgba(53,231,255,.5) rgba(255,255,255,.04);
  }
  .scene-copy::-webkit-scrollbar { width: 4px; }
  .scene-copy::-webkit-scrollbar-track { background: rgba(255,255,255,.04); }
  .scene-copy::-webkit-scrollbar-thumb { border-radius: 4px; background: linear-gradient(var(--cyan), var(--crimson)); }
  .scene-kicker { margin-bottom: 14px; }
  h1 { font-size: clamp(42px, 13vw, 56px); line-height: .9; }
  .scene-lead { margin: 17px 0; font-size: 14px; line-height: 1.55; }
  .scene-meta div { padding: 7px 0; }
  .scope-button { margin-top: 13px; }
  .system-note, .interaction-hint { display: none; }
  .stage-controls {
    left: 0;
    right: 0;
    bottom: 0;
    height: 64px;
    justify-content: center;
    padding: 0 18px;
    border-top: 1px solid var(--line-soft);
    background: rgba(6, 8, 16, .96);
    backdrop-filter: blur(18px);
  }
  .scene-progress { flex: 1; max-width: 130px; }
  .scope-dialog, .brief-dialog {
    width: 100vw;
    height: 100svh;
    max-height: 100svh;
    margin: 0;
    border: 0;
    border-radius: 0;
  }
  .dialog-topline { height: 53px; }
  .scope-layout {
    display: block;
    max-height: calc(100svh - 53px);
  }
  .scope-visual {
    position: relative;
    min-height: 34svh;
    height: 34svh;
  }
  .scope-visual img { width: 106%; }
  .scope-content { padding: 31px 23px 40px; }
  .scope-content h2, .brief-heading h2 { font-size: 43px; }
  .brief-dialog form {
    display: block;
    padding: 29px 22px 38px;
  }
  .brief-heading { position: static; }
  .brief-fields { margin-top: 28px; }
  .field-row, fieldset { grid-template-columns: 1fr; }
}

@media (max-height: 720px) and (min-width: 761px) {
  .scene-copy { top: 92px; transform: scale(.88); transform-origin: top left; }
  .scene-copy.changing { transform: translateY(9px) scale(.88); }
  .position-index { top: 21vh; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .intro { display: none; }
  .board-art { transform: none !important; }
}