:root {
  --black: #070807;
  --graphite: #111312;
  --charcoal: #1d211f;
  --chalk: #f2eee6;
  --mist: #aaa99f;
  --copper: #a85e35;
  --copper-hot: #e6a06e;
  --line: rgba(242, 238, 230, .16);
  --glass: rgba(10, 11, 10, .72);
  --energy: 0;
  --explode: 0;
  --product-x: 0px;
  --product-y: 0px;
  --product-scale: 1;
  --product-rotate: -8deg;
  --pointer-x: 0;
  --pointer-y: 0;
}

* { box-sizing: border-box; }
html {
  overflow-x: clip;
  background: var(--black);
  color-scheme: dark;
  scroll-behavior: smooth;
}
body {
  margin: 0;
  overflow-x: clip;
  background: var(--black);
  color: var(--chalk);
  font-family: "Avenir Next", "Helvetica Neue", sans-serif;
}
button, a { color: inherit; }
a { text-decoration: none; }
button { font: inherit; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 18px;
  padding: 10px 14px;
  background: var(--chalk);
  color: var(--black);
  transform: translateY(-160%);
  transition: transform .2s;
}
.skip-link:focus { transform: none; }
:focus-visible { outline: 2px solid var(--copper-hot); outline-offset: 5px; }

.hyperbelt {
  position: fixed;
  z-index: 0;
  inset: 0;
  overflow: hidden;
  background: var(--black);
  pointer-events: none;
}
.hyperbelt video,
.hyperbelt-poster {
  position: absolute;
  width: 100%;
  height: 100%;
  inset: 0;
  object-fit: cover;
}
.hyperbelt video {
  opacity: .72;
  filter: saturate(.62) contrast(1.12) brightness(.64);
}
.hyperbelt-poster {
  background: var(--black) url("assets/hyperbelt-poster.webp") center / cover no-repeat;
  filter: saturate(.58) contrast(1.1) brightness(.62);
}
.hyperbelt-poster:not([hidden]) { display: block; }
.hyperbelt-vignette {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 8, 7, .94) 0%, rgba(7, 8, 7, .66) 34%, rgba(7, 8, 7, .16) 62%, rgba(7, 8, 7, .6) 100%),
    linear-gradient(180deg, rgba(7, 8, 7, .7), transparent 24%, transparent 72%, rgba(7, 8, 7, .92)),
    radial-gradient(circle at 71% 47%, transparent 0 18%, rgba(7, 8, 7, .28) 58%, rgba(7, 8, 7, .72) 100%);
}

#sound-field {
  position: fixed;
  z-index: 1;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  mix-blend-mode: screen;
}
.noise {
  position: fixed;
  z-index: 7;
  inset: 0;
  opacity: .18;
  mix-blend-mode: soft-light;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.28'/%3E%3C/svg%3E");
}

.site-header {
  position: fixed;
  z-index: 60;
  top: 0;
  left: 0;
  right: 0;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 78px;
  padding: 0 clamp(20px, 4vw, 64px);
  border-bottom: 1px solid transparent;
  transition: background .3s, border-color .3s;
}
body.is-scrolled .site-header {
  border-color: var(--line);
  background: rgba(7, 8, 7, .76);
  backdrop-filter: blur(18px);
}
.wordmark {
  justify-self: start;
  font-family: "Avenir Next Condensed", sans-serif;
  font-size: .88rem;
  font-weight: 700;
  letter-spacing: .3em;
}
.wordmark span {
  display: inline-grid;
  width: 26px;
  height: 26px;
  margin-right: 10px;
  place-items: center;
  border: 1px solid var(--copper);
  border-radius: 50%;
  color: var(--copper-hot);
  font-size: .65rem;
  letter-spacing: 0;
}
.edition {
  margin: 0;
  color: var(--mist);
  font-size: .61rem;
  letter-spacing: .2em;
  text-transform: uppercase;
}
.sound-control {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 11px;
  min-height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  font-size: .66rem;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.sound-glyph {
  display: flex;
  align-items: center;
  gap: 2px;
  width: 22px;
  height: 20px;
}
.sound-glyph i {
  display: block;
  width: 2px;
  height: 5px;
  background: var(--copper-hot);
}
[aria-pressed="true"] .sound-glyph i:nth-child(1) { animation: meter .7s -.2s ease-in-out infinite alternate; }
[aria-pressed="true"] .sound-glyph i:nth-child(2) { animation: meter .5s -.4s ease-in-out infinite alternate; }
[aria-pressed="true"] .sound-glyph i:nth-child(3) { animation: meter .9s -.1s ease-in-out infinite alternate; }
[aria-pressed="true"] .sound-glyph i:nth-child(4) { animation: meter .6s -.3s ease-in-out infinite alternate; }
@keyframes meter { to { height: 18px; } }

.halo-viewport {
  position: fixed;
  z-index: 4;
  top: 9vh;
  right: 1.5vw;
  width: min(59vw, 960px);
  height: 82vh;
  min-height: 560px;
  pointer-events: none;
  transition: transform .8s cubic-bezier(.18, .72, .2, 1), opacity .35s;
}
[data-halo-canvas] {
  position: absolute;
  width: 100%;
  height: 100%;
  inset: 0;
  display: block;
  background: transparent;
  cursor: grab;
  pointer-events: auto;
  touch-action: pan-y;
}
[data-halo-canvas]:active { cursor: grabbing; }
[data-halo-canvas]:focus-visible {
  outline: 2px solid var(--copper-hot);
  outline-offset: -6px;
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.drag-hint {
  position: absolute;
  right: 8%;
  bottom: 21%;
  display: flex;
  gap: 8px;
  margin: 0;
  color: rgba(242, 238, 230, .64);
  font-size: .58rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  opacity: .9;
}
.drag-hint span { color: var(--copper-hot); font-size: .9rem; line-height: .7; }

.halo-css-fallback {
  position: absolute;
  inset: 3%;
  display: none;
  pointer-events: none;
  perspective: 1200px;
}
.webgl-unavailable [data-halo-canvas] { display: none; }
.webgl-unavailable [data-webgl-fallback] { display: block; opacity: 1; visibility: visible; }
.webgl-unavailable .drag-hint { display: none; }

.halo-product {
  position: absolute;
  inset: 6%;
  transform-style: preserve-3d;
  transform: rotateX(calc(5deg + var(--pointer-y) * -2deg)) rotateY(calc(var(--product-rotate) + var(--pointer-x) * 4deg));
}
.orbital {
  position: absolute;
  inset: 8%;
  border: 1px solid rgba(229, 160, 110, calc(.12 + var(--energy) * .25));
  border-radius: 50%;
  transform: scale(calc(1 + var(--energy) * .08));
}
.orbital-a { animation: orbit 18s linear infinite; }
.orbital-b { inset: 20%; border-color: rgba(242, 238, 230, .08); animation: orbit 12s linear infinite reverse; }
.orbital::after {
  content: "";
  position: absolute;
  top: -3px;
  left: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--copper-hot);
  box-shadow: 0 0 25px var(--copper);
}
@keyframes orbit { to { rotate: 360deg; } }

.halo-shell,
.driver-array,
.magnet-core,
.copper-plinth {
  position: absolute;
  left: 50%;
  transform-style: preserve-3d;
  transition: translate .25s linear, opacity .25s;
}
.halo-shell {
  z-index: 4;
  top: 12%;
  width: 70%;
  aspect-ratio: 1;
  translate: -50% calc(var(--explode) * -112px);
  border-radius: 50%;
  background: radial-gradient(circle at 37% 28%, #424846 0, #242826 24%, #121412 58%, #050605 76%);
  box-shadow: inset 18px 16px 24px rgba(255, 255, 255, .055), inset -20px -24px 32px #000, 0 42px 80px rgba(0, 0, 0, .48), 0 0 calc(28px + var(--energy) * 70px) rgba(168, 94, 53, calc(.12 + var(--energy) * .22));
}
.halo-shell::after {
  content: "";
  position: absolute;
  z-index: 0;
  inset: 25%;
  border-radius: 50%;
  background: radial-gradient(circle at 55% 72%, rgba(168, 94, 53, .16), #080908 62%);
  box-shadow: inset 9px 10px 18px #000, 0 0 0 1px rgba(255, 255, 255, .06);
}
.shell-rim { position: absolute; z-index: 2; border-radius: 50%; pointer-events: none; }
.shell-rim-outer { inset: 1%; border: 1px solid rgba(255, 255, 255, .09); }
.shell-rim-inner { inset: 24%; border: 1px solid rgba(229, 160, 110, .16); }
.speaker-mesh {
  position: absolute;
  z-index: 1;
  inset: 5%;
  border-radius: 50%;
  opacity: .48;
  background: repeating-conic-gradient(from 12deg, rgba(255, 255, 255, .1) 0 1deg, transparent 1deg 3deg);
  mask: radial-gradient(circle, transparent 0 34%, #000 35% 69%, transparent 70%);
}
.halo-mark {
  position: absolute;
  z-index: 3;
  top: 47%;
  right: 7%;
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  border: 1px solid var(--copper);
  border-radius: 50%;
  color: var(--copper-hot);
  font-size: .65rem;
  font-weight: 600;
}
.driver-array {
  z-index: 3;
  top: 30%;
  width: 48%;
  aspect-ratio: 1;
  translate: -50% calc(var(--explode) * 5px);
  border: 1px solid rgba(229, 160, 110, .38);
  border-radius: 50%;
  opacity: calc(.06 + var(--explode) * .94);
}
.driver-array span {
  position: absolute;
  top: -7px;
  left: calc(50% - 7px);
  width: 14px;
  height: 14px;
  border: 1px solid var(--copper);
  border-radius: 50%;
  background: #151715;
  transform-origin: 7px calc(50% + 7vw);
}
.driver-array span:nth-child(2) { rotate: 30deg; }
.driver-array span:nth-child(3) { rotate: 60deg; }
.driver-array span:nth-child(4) { rotate: 90deg; }
.driver-array span:nth-child(5) { rotate: 120deg; }
.driver-array span:nth-child(6) { rotate: 150deg; }
.driver-array span:nth-child(7) { rotate: 180deg; }
.driver-array span:nth-child(8) { rotate: 210deg; }
.driver-array span:nth-child(9) { rotate: 240deg; }
.driver-array span:nth-child(10) { rotate: 270deg; }
.driver-array span:nth-child(11) { rotate: 300deg; }
.driver-array span:nth-child(12) { rotate: 330deg; }
.magnet-core {
  z-index: 2;
  top: 51%;
  width: 31%;
  height: 9%;
  translate: -50% calc(var(--explode) * 92px);
  border: 1px solid rgba(229, 160, 110, .48);
  border-radius: 50%;
  background: radial-gradient(ellipse, #c17b4e, #5b2e18 48%, #120a07 72%);
  opacity: calc(.12 + var(--explode) * .88);
  box-shadow: 0 0 calc(20px + var(--energy) * 50px) rgba(229, 160, 110, .28);
}
.magnet-core span { position: absolute; inset: 28%; border: 1px solid rgba(255, 255, 255, .18); border-radius: 50%; }
.copper-plinth {
  z-index: 1;
  top: 67%;
  width: 46%;
  height: 20%;
  translate: -50% calc(var(--explode) * 145px);
  border-radius: 50% 50% 12% 12% / 30% 30% 12% 12%;
  background: linear-gradient(100deg, #442113, #a55d36 19%, #e2a073 44%, #824326 70%, #2b150d);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .38), 0 45px 70px rgba(0, 0, 0, .68);
}
.plinth-top {
  position: absolute;
  inset: -2% 0 60%;
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 50%;
  background: radial-gradient(ellipse, #130b08 0 28%, #6e3922 31%, #d18b5c 58%, #4c2617 77%);
}
.plinth-face {
  position: absolute;
  inset: 45% 12% auto;
  display: flex;
  justify-content: space-between;
  color: rgba(15, 8, 5, .75);
  font-size: .48rem;
  font-weight: 700;
  letter-spacing: .25em;
}
.plinth-face i { width: 5px; height: 5px; border-radius: 50%; background: #120906; box-shadow: 0 0 9px #ffba82; }
.product-shadow {
  position: absolute;
  z-index: 0;
  right: 25%;
  bottom: 9%;
  left: 25%;
  height: 8%;
  border-radius: 50%;
  background: rgba(0, 0, 0, .8);
  filter: blur(22px);
}

main { position: relative; z-index: 5; }
section {
  position: relative;
  min-height: 112vh;
  padding: clamp(110px, 13vh, 160px) clamp(24px, 6vw, 96px);
}
.text-scrim { position: relative; isolation: isolate; }
.text-scrim::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -58px -90px;
  background: radial-gradient(ellipse at 25% 50%, rgba(7, 8, 7, .96), rgba(7, 8, 7, .72) 52%, transparent 78%);
  filter: blur(5px);
}
.eyebrow {
  margin: 0 0 24px;
  color: var(--copper-hot);
  font-size: .64rem;
  font-weight: 600;
  letter-spacing: .3em;
  text-transform: uppercase;
}
h1, h2 {
  margin: 0;
  max-width: 1000px;
  font-family: "Bodoni 72", Didot, "Times New Roman", serif;
  font-weight: 400;
  letter-spacing: -.055em;
  line-height: .88;
}
h1 { font-size: clamp(5rem, 11.7vw, 11.7rem); }
h2 { font-size: clamp(3.5rem, 7.5vw, 8rem); }
h1 em { color: var(--copper-hot); font-weight: 400; }
.lede,
.chapter-copy > p:last-child,
.field-copy > p,
.concept-note {
  max-width: 540px;
  color: #d4d1ca;
  font-family: "Bodoni 72", Didot, serif;
  font-size: clamp(1.2rem, 1.75vw, 1.65rem);
  line-height: 1.5;
}

#hero { display: flex; align-items: center; min-height: 100svh; }
.hero-copy { width: 57%; }
.hero-copy .lede { max-width: 440px; margin: 38px 0 0; }
.hero-spec {
  position: absolute;
  right: clamp(24px, 4vw, 64px);
  bottom: 82px;
  display: flex;
  gap: 20px;
  color: var(--mist);
  font-size: .58rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
}
.hero-spec span { padding-top: 13px; border-top: 1px solid var(--line); }
.scroll-cue {
  position: absolute;
  bottom: 38px;
  left: clamp(24px, 6vw, 96px);
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--mist);
  font-size: .6rem;
  letter-spacing: .2em;
  text-transform: uppercase;
}
.scroll-cue i { display: block; width: 68px; height: 1px; overflow: hidden; background: var(--line); }
.scroll-cue i::after { content: ""; display: block; width: 40%; height: 100%; background: var(--copper-hot); animation: scan 2s ease-in-out infinite; }
@keyframes scan { 50% { translate: 150% 0; } }

#thesis { display: flex; align-items: center; }
.chapter-number {
  position: absolute;
  top: 19%;
  left: 6vw;
  margin: 0;
  color: rgba(242, 238, 230, .38);
  font: .59rem ui-monospace, monospace;
  letter-spacing: .2em;
  text-transform: uppercase;
}
.chapter-copy { width: min(55%, 860px); }
.chapter-copy > p:last-child { margin: 42px 0 0; }
.metric-stack {
  position: absolute;
  right: 5vw;
  bottom: 10vh;
  display: grid;
  width: min(32vw, 410px);
  border-top: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(7, 8, 7, .1), rgba(7, 8, 7, .72));
}
.metric-stack div {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.metric-stack strong { font: 400 clamp(2rem, 4vw, 4rem) "Bodoni 72", serif; }
.metric-stack span { color: var(--mist); font-size: .62rem; letter-spacing: .15em; text-transform: uppercase; }

#anatomy { min-height: 145vh; }
.anatomy-head { width: 55%; }
.part-ledger {
  position: absolute;
  top: 27%;
  right: 5vw;
  width: min(35vw, 500px);
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
  background: linear-gradient(90deg, rgba(7, 8, 7, .22), rgba(7, 8, 7, .76));
}
.part-ledger li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 3px 18px;
  padding: 21px 0;
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.part-ledger span { grid-row: 1 / 3; color: var(--copper-hot); font: .68rem ui-monospace, monospace; }
.part-ledger strong { font: 400 1.4rem "Bodoni 72", serif; }
.part-ledger small { color: var(--mist); font-size: .67rem; letter-spacing: .08em; }

#field { display: flex; align-items: center; justify-content: flex-end; }
.field-copy { width: min(52%, 760px); }
.field-copy > p { margin: 40px 0 34px; }
.inline-sound {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-width: 270px;
  min-height: 58px;
  padding: 0 20px;
  border: 1px solid var(--copper);
  background: rgba(7, 8, 7, .76);
  cursor: pointer;
  font-size: .66rem;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.inline-sound:hover { background: var(--copper); }
.field-readout {
  position: absolute;
  bottom: 12vh;
  left: 6vw;
  width: min(34vw, 420px);
  padding: 24px;
  border: 1px solid var(--line);
  background: rgba(7, 8, 7, .68);
  backdrop-filter: blur(16px);
}
.field-readout p { margin: 18px 0 0; color: var(--mist); font-size: .66rem; letter-spacing: .08em; }
.signal-bars { display: flex; align-items: end; gap: 6px; height: 38px; }
.signal-bars i { flex: 1; height: calc(10% + var(--energy) * 75%); background: linear-gradient(var(--copper-hot), var(--copper)); transform-origin: bottom; }
.signal-bars i:nth-child(2n) { transform: scaleY(.72); }
.signal-bars i:nth-child(3n) { transform: scaleY(.42); }
.signal-bars i:nth-child(5n) { transform: scaleY(.9); }

#materials { min-height: 128vh; }
.materials-head { max-width: 860px; }
.material-grid {
  position: absolute;
  right: 6vw;
  bottom: 10vh;
  left: 6vw;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}
.material-card {
  position: relative;
  min-height: 320px;
  padding: 22px;
  overflow: hidden;
  background: rgba(9, 10, 9, .94);
}
.material-card > span { position: absolute; z-index: 2; top: 18px; right: 18px; color: var(--copper-hot); font: .62rem ui-monospace, monospace; }
.material-card > div { height: 190px; margin: -22px -22px 24px; transition: transform .6s cubic-bezier(.2, .7, .2, 1); }
.material-card:hover > div { transform: scale(1.05); }
.material-card.ceramic > div { background: radial-gradient(circle at 62% 42%, #606763, #252925 28%, #0c0e0c 72%); }
.material-card.mesh > div {
  background-color: #111311;
  background-image: repeating-linear-gradient(52deg, transparent 0 5px, rgba(255, 255, 255, .11) 5px 6px), repeating-linear-gradient(-52deg, transparent 0 5px, rgba(168, 94, 53, .12) 5px 6px);
}
.material-card.copper > div { background: linear-gradient(115deg, #2d140b, #814125 20%, #e0a071 40%, #6d331d 58%, #c97848 73%, #32170d); }
.material-card h3 { margin: 0; font: 400 1.6rem "Bodoni 72", serif; }
.material-card p { margin: 8px 0 0; color: var(--mist); font-size: .74rem; }

#finale { display: flex; flex-direction: column; justify-content: center; min-height: 112vh; }
.finale-copy { width: min(70%, 1000px); }
.concept-note { margin: 40px 0 28px; }
.final-link {
  display: inline-flex;
  align-items: center;
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--copper);
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
}
.final-link span { color: var(--copper-hot); font-size: 1.2rem; }
.no-commerce { margin: 20px 0 0; color: var(--mist); font-size: .66rem; }
footer {
  position: absolute;
  right: 6vw;
  bottom: 30px;
  left: 6vw;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--mist);
  font-size: .56rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.product-console {
  position: fixed;
  z-index: 55;
  right: clamp(18px, 3vw, 48px);
  bottom: 26px;
  width: min(46vw, 620px);
  border: 1px solid var(--line);
  background: rgba(8, 9, 8, .74);
  backdrop-filter: blur(18px);
  transition: opacity .25s, transform .25s;
}
.console-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  border-bottom: 1px solid var(--line);
  color: var(--mist);
  font: .54rem ui-monospace, monospace;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.console-head p { margin: 0; }
.mode-controls { display: grid; grid-template-columns: repeat(4, 1fr); }
.mode-controls button {
  display: grid;
  gap: 5px;
  min-height: 58px;
  padding: 10px 12px;
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
  color: var(--mist);
  cursor: pointer;
  text-align: left;
  font-size: .56rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.mode-controls button:last-child { border-right: 0; }
.mode-controls button i {
  color: var(--copper-hot);
  font: normal .51rem ui-monospace, monospace;
}
.mode-controls button:hover { background: rgba(230, 160, 110, .08); color: var(--chalk); }
.mode-controls button[aria-pressed="true"] { background: var(--chalk); color: var(--black); }
.mode-controls button[aria-pressed="true"] i { color: var(--copper); }
body[data-stage="finale"] .product-console { opacity: 0; pointer-events: none; transform: translateY(18px); }

@media (max-width: 980px) {
  .halo-viewport { right: -8vw; width: 72vw; }
  .hero-copy, .chapter-copy, .anatomy-head, .field-copy, .finale-copy { width: 70%; }
  .metric-stack, .part-ledger { width: 41vw; }
  .product-console { width: min(58vw, 590px); }
}

@media (max-width: 760px) {
  :root {
    --mobile-console-safe: 264px;
    --mobile-field-console-safe: 352px;
  }
  .site-header { grid-template-columns: 1fr auto; min-height: 66px; padding-inline: 18px; }
  .edition { display: none; }
  .hyperbelt video, .hyperbelt-poster { object-position: 62% center; }
  .hyperbelt video { opacity: .58; }
  .hyperbelt-vignette {
    background:
      linear-gradient(180deg, rgba(7, 8, 7, .88) 0%, rgba(7, 8, 7, .34) 34%, rgba(7, 8, 7, .14) 58%, rgba(7, 8, 7, .96) 100%),
      radial-gradient(circle at 52% 47%, transparent 0 17%, rgba(7, 8, 7, .38) 72%);
  }
  .halo-viewport {
    top: 36vh;
    right: 0;
    left: 0;
    width: auto;
    height: 48vh;
    min-height: 0;
  }
  .drag-hint { right: 8%; bottom: 25%; }
  section { min-height: 118svh; padding: 96px 20px var(--mobile-console-safe); }
  .text-scrim::before {
    inset: -30px -20px;
    background: radial-gradient(ellipse at 22% 50%, rgba(7, 8, 7, .97), rgba(7, 8, 7, .82) 56%, transparent 84%);
  }
  h1 { font-size: clamp(4.25rem, 23vw, 6.8rem); }
  h2 { font-size: clamp(3.15rem, 15.5vw, 5.2rem); }
  .hero-copy, .chapter-copy, .anatomy-head, .field-copy, .finale-copy { width: 100%; }
  .hero-copy { align-self: flex-start; padding-top: 5vh; }
  .hero-copy .lede { max-width: 90%; margin-top: 24px; }
  .hero-spec { display: none; }
  .scroll-cue { bottom: 190px; left: 20px; }
  .chapter-copy > p:last-child, .field-copy > p, .concept-note, .lede { font-size: 1.1rem; }
  .chapter-number { top: 10%; left: 20px; }
  .metric-stack {
    right: 20px;
    bottom: var(--mobile-console-safe);
    left: 20px;
    width: auto;
    grid-template-columns: repeat(3, 1fr);
    background: rgba(7, 8, 7, .72);
    backdrop-filter: blur(12px);
  }
  .metric-stack div { display: block; padding: 14px 8px 14px 0; }
  .metric-stack strong, .metric-stack span { display: block; }
  .metric-stack span { margin-top: 6px; font-size: .48rem; }
  #anatomy { min-height: 156svh; }
  .part-ledger {
    top: auto;
    right: 20px;
    bottom: var(--mobile-console-safe);
    left: 20px;
    width: auto;
    background: rgba(7, 8, 7, .75);
  }
  #field {
    align-items: flex-start;
    justify-content: flex-start;
    padding-top: 15vh;
    padding-bottom: var(--mobile-field-console-safe);
  }
  .field-copy > p { margin: 24px 0 18px; }
  .inline-sound { min-height: 50px; }
  .field-readout {
    right: 20px;
    bottom: var(--mobile-field-console-safe);
    left: 20px;
    width: auto;
  }
  #materials { min-height: auto; }
  .material-grid { position: relative; right: auto; bottom: auto; left: auto; grid-template-columns: 1fr; margin-top: 52vh; }
  .material-card { min-height: 250px; }
  .material-card > div { height: 145px; }
  #finale { min-height: 110svh; padding-bottom: 150px; }
  .finale-copy { padding-top: 3vh; }
  footer { right: 20px; bottom: 22px; left: 20px; flex-direction: column; }
  .product-console {
    right: 12px;
    bottom: 10px;
    left: 12px;
    width: auto;
  }
  .console-head { min-height: 34px; }
  .mode-controls { grid-template-columns: repeat(2, 1fr); }
  .mode-controls button {
    min-height: 64px;
    padding: 10px 12px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    font-size: .68rem;
    letter-spacing: .055em;
  }
  .mode-controls button:nth-child(2) { border-right: 0; }
  .mode-controls button:nth-child(n + 3) { border-bottom: 0; }
}

@media (max-width: 430px) {
  .sound-control [data-sound-label] { display: none; }
  .sound-control { gap: 0; }
  .mode-controls button { line-height: 1.35; }
  .console-head p { max-width: 58%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .hyperbelt video { display: none; }
  .hyperbelt-poster { display: block !important; }
  .halo-product { transform: rotateX(5deg) rotateY(-8deg); }
  .orbital { opacity: .38; animation: none; }
  .drag-hint { display: none; }
}