@font-face {
  font-family: "Instrument Sans";
  src: url("./fonts/instrument-sans-latin-variable.woff2") format("woff2");
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
}

@font-face {
  font-family: "Newsreader";
  src: url("./fonts/newsreader-latin-variable.woff2") format("woff2");
  font-style: normal;
  font-weight: 300 600;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("./fonts/ibm-plex-mono-latin-400.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("./fonts/ibm-plex-mono-latin-500.woff2") format("woff2");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

:root {
  --void: #030303;
  --ink: #090909;
  --ink-raised: #0f0f0f;
  --paper: #f2f1ed;
  --paper-rgb: 242 241 237;
  --ash: #969694;
  --ash-dark: #666664;
  --line: rgba(242, 241, 237, 0.13);
  --line-strong: rgba(242, 241, 237, 0.28);
  --trace: #f2f1ed;
  --trace-rgb: 242 241 237;
  --trace-ink: #030303;
  --rail: 252px;
  --content-max: 1240px;
  --sans: "Instrument Sans", "Helvetica Neue", Arial, sans-serif;
  --editorial: "Newsreader", Georgia, serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --ease-out: cubic-bezier(0.2, 0.82, 0.2, 1);
  color-scheme: dark;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

:root[data-palette="oxide"] {
  --trace: #ff5c50;
  --trace-rgb: 255 92 80;
  --trace-ink: #070100;
}

:root[data-palette="phosphor"] {
  --trace: #a8ffc7;
  --trace-rgb: 168 255 199;
  --trace-ink: #001107;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 83% 4%, rgba(var(--trace-rgb) / 0.035), transparent 24rem),
    var(--void);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 430;
  line-height: 1.55;
}

body::before {
  content: "";
  position: fixed;
  z-index: 1;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.012) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.012) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to right, transparent var(--rail), #000 62%, transparent 100%);
}

::selection {
  background: var(--trace);
  color: var(--trace-ink);
}

a {
  color: inherit;
  text-underline-offset: 0.2em;
}

button,
input,
a {
  font: inherit;
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 2px solid var(--trace);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  transform: translateY(-160%);
  background: var(--paper);
  color: var(--void);
  font-weight: 650;
  text-decoration: none;
}

.skip-link:focus {
  transform: translateY(0);
}

.review-rail {
  position: fixed;
  z-index: 30;
  inset: 0 auto 0 0;
  width: var(--rail);
  display: flex;
  flex-direction: column;
  padding: 26px 22px 20px;
  border-right: 1px solid var(--line);
  background: rgba(3, 3, 3, 0.92);
  backdrop-filter: blur(18px);
}

.rail-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.rail-brand__mark,
.document-footer__mark {
  width: 24px;
  height: 24px;
  border: 1px solid var(--paper);
  transform: rotate(45deg);
}

.rail-brand > span:last-child {
  display: grid;
  gap: 3px;
}

.rail-brand b,
.rail-brand small,
.rail-label,
.rail-nav,
.rail-controls,
.rail-meta {
  font-family: var(--mono);
}

.rail-brand b {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.11em;
}

.rail-brand small {
  color: var(--ash);
  font-size: 7px;
  letter-spacing: 0.08em;
}

.rail-label {
  margin: 18px 0 9px;
  color: var(--ash-dark);
  font-size: 8px;
  letter-spacing: 0.12em;
}

.rail-nav {
  display: grid;
}

.rail-nav a {
  min-height: 31px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid rgba(242, 241, 237, 0.045);
  color: var(--ash);
  font-size: 9px;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: color 180ms ease, transform 180ms ease;
}

.rail-nav a span {
  width: 19px;
  color: var(--ash-dark);
}

.rail-nav a:hover,
.rail-nav a.is-current {
  color: var(--paper);
  transform: translateX(3px);
}

.rail-nav a.is-current span {
  color: var(--trace);
}

.rail-controls {
  display: grid;
  gap: 10px;
  margin-top: auto;
}

.rail-controls fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}

.rail-controls legend {
  margin-bottom: 5px;
  color: var(--ash-dark);
  font-size: 7px;
  letter-spacing: 0.11em;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
}

.segmented button {
  min-height: 30px;
  padding: 0 4px;
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
  color: var(--ash);
  font-size: 7px;
  cursor: pointer;
}

.segmented button:last-child {
  border-right: 0;
}

.segmented button[aria-pressed="true"] {
  background: var(--trace);
  color: var(--trace-ink);
}

.rail-toggle {
  min-height: 34px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 9px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ash);
  font-size: 8px;
  cursor: pointer;
  text-align: left;
}

.rail-toggle__light {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--trace);
  box-shadow: 0 0 9px rgba(var(--trace-rgb) / 0.72);
}

:root[data-motion="still"] .rail-toggle__light,
:root[data-runtime="static"] .rail-toggle__light {
  background: var(--ash-dark);
  box-shadow: none;
}

.rail-meta {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 4px 7px;
  margin-top: 13px;
  color: var(--ash-dark);
  font-size: 6px;
  letter-spacing: 0.05em;
}

.rail-meta b {
  color: var(--ash);
  font-weight: 400;
}

main {
  position: relative;
  z-index: 2;
  margin-left: var(--rail);
}

.chapter {
  position: relative;
  min-height: 88vh;
  padding: clamp(92px, 10vw, 160px) clamp(30px, 6vw, 104px);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.chapter::after {
  content: attr(data-chapter);
  position: absolute;
  z-index: 0;
  top: 2.5vw;
  right: 2.5vw;
  color: rgba(242, 241, 237, 0.023);
  font: 400 clamp(90px, 16vw, 240px) / 0.8 var(--sans);
  letter-spacing: -0.08em;
}

.chapter > * {
  position: relative;
  z-index: 2;
}

.chapter-ruler {
  position: absolute;
  top: 27px;
  right: clamp(30px, 6vw, 104px);
  left: clamp(30px, 6vw, 104px);
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ash-dark);
  font: 7px var(--mono);
}

.chapter-ruler i {
  flex: 1;
  height: 5px;
  border: solid var(--line);
  border-width: 0 1px 1px;
}

.eyebrow,
.specimen-label,
.type-id,
.component-label,
.principle-grid article > span,
.shader-card__copy > span,
.motion-grammar article > span,
.budget-grid article > span {
  font: 500 9px / 1.35 var(--mono);
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--trace);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2 {
  margin-bottom: 0;
  font-weight: 480;
  letter-spacing: -0.06em;
  line-height: 0.91;
  text-wrap: balance;
}

h1 {
  font-size: clamp(60px, 8.4vw, 136px);
}

h2 {
  font-size: clamp(48px, 6.8vw, 104px);
}

h1 em,
h2 em {
  font-family: var(--editorial);
  font-weight: 350;
}

h3 {
  margin-bottom: 12px;
  font-size: clamp(19px, 1.8vw, 28px);
  font-weight: 520;
  letter-spacing: -0.025em;
  line-height: 1.15;
  text-wrap: balance;
}

.section-heading {
  max-width: var(--content-max);
  margin-bottom: clamp(56px, 8vw, 108px);
}

.split-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(260px, 0.45fr);
  gap: 8vw;
  align-items: end;
}

.split-heading > p {
  max-width: 470px;
  margin: 0 0 4px;
  color: var(--ash);
  font-size: clamp(14px, 1.25vw, 18px);
  line-height: 1.65;
  text-wrap: pretty;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 30px;
}

.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 17px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--paper);
  font: 500 9px var(--mono);
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color 180ms ease, background 180ms ease, color 180ms ease, transform 180ms ease;
}

.button:hover {
  border-color: var(--trace);
  transform: translateY(-2px);
}

.button--primary {
  border-color: var(--paper);
  background: var(--paper);
  color: var(--void);
}

:root:not([data-palette="mono"]) .button--primary:hover {
  border-color: var(--trace);
  background: var(--trace);
  color: var(--trace-ink);
}

.hero {
  min-height: 100svh;
  padding-top: clamp(138px, 17vh, 200px);
}

.hero__copy {
  position: relative;
  z-index: 5;
  width: min(760px, 58vw);
}

.hero__copy h1 em {
  color: var(--trace);
}

.hero__deck {
  max-width: 640px;
  margin: 30px 0 0;
  color: var(--ash);
  font-size: clamp(16px, 1.5vw, 22px);
  line-height: 1.58;
  text-wrap: pretty;
}

.hero__stage {
  position: absolute;
  z-index: 1;
  top: 12vh;
  right: -2vw;
  width: min(56vw, 880px);
  height: min(64vw, 740px);
}

.shader-stage,
.shader-specimen {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink);
}

.shader-specimen canvas,
.shader-fallback {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.shader-specimen canvas {
  display: none;
}

.webgl-ready[data-runtime="webgl"] .shader-specimen.is-live canvas {
  display: block;
}

.webgl-ready[data-runtime="webgl"] .shader-specimen.is-live .shader-fallback {
  display: none;
}

.stage-hud,
.shader-specimen figcaption {
  position: absolute;
  z-index: 4;
  top: 17px;
  right: 18px;
  left: 18px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin: 0;
  color: var(--ash);
  font: 7px var(--mono);
  letter-spacing: 0.1em;
  pointer-events: none;
}

.stage-hud span:last-child,
.shader-specimen figcaption b {
  color: var(--trace);
  font-weight: 400;
}

.stage-copy {
  position: absolute;
  z-index: 4;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.55em;
  color: rgba(242, 241, 237, 0.55);
  font-size: clamp(12px, 1.2vw, 18px);
  pointer-events: none;
}

.stage-copy b {
  color: var(--paper);
  font-family: var(--editorial);
  font-size: 1.7em;
  font-weight: 350;
  font-style: italic;
}

.hero__thesis {
  position: relative;
  z-index: 6;
  max-width: 760px;
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 30px;
  align-items: start;
  margin-top: clamp(86px, 11vw, 150px);
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.hero__thesis span {
  color: var(--trace);
  font: 8px var(--mono);
  letter-spacing: 0.1em;
}

.hero__thesis p {
  margin: 0;
  color: var(--ash);
  font-size: 14px;
}

.shader-fallback {
  overflow: hidden;
  background-color: #050505;
}

.shader-fallback::before,
.shader-fallback::after {
  content: "";
  position: absolute;
}

.shader-fallback--signal {
  background-image:
    radial-gradient(circle, rgba(var(--trace-rgb) / 0.58) 0 1px, transparent 1.3px),
    radial-gradient(circle at 56% 48%, rgba(var(--trace-rgb) / 0.15), transparent 32%),
    linear-gradient(116deg, transparent 0 48%, rgba(var(--trace-rgb) / 0.06) 49% 50%, transparent 51%);
  background-size: 13px 13px, 100% 100%, 100% 100%;
  mask-image: radial-gradient(ellipse at 56% 48%, #000 0 26%, transparent 66%);
}

.shader-fallback--signal::after {
  width: 31%;
  aspect-ratio: 1;
  top: 32%;
  left: 43%;
  border: 1px solid rgba(var(--trace-rgb) / 0.5);
  border-radius: 50%;
  box-shadow: 0 0 80px rgba(var(--trace-rgb) / 0.06);
}

.shader-fallback--signal i {
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--trace);
}

.shader-fallback--signal i:nth-child(1) { top: 24%; left: 43%; }
.shader-fallback--signal i:nth-child(2) { top: 42%; left: 29%; }
.shader-fallback--signal i:nth-child(3) { top: 58%; left: 51%; }
.shader-fallback--signal i:nth-child(4) { top: 34%; left: 68%; }
.shader-fallback--signal i:nth-child(5) { top: 71%; left: 63%; }
.shader-fallback--signal i:nth-child(6) { top: 49%; left: 76%; }
.shader-fallback--signal i:nth-child(7) { top: 66%; left: 34%; }
.shader-fallback--signal i:nth-child(8) { top: 18%; left: 57%; }

.principle-grid {
  max-width: var(--content-max);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border: solid var(--line);
  border-width: 1px 0 0 1px;
}

.principle-grid article {
  min-height: 260px;
  padding: clamp(26px, 4vw, 52px);
  border: solid var(--line);
  border-width: 0 1px 1px 0;
}

.principle-grid article > span {
  color: var(--trace);
}

.principle-grid h3 {
  max-width: 470px;
  margin-top: 45px;
}

.principle-grid p {
  max-width: 480px;
  margin-bottom: 0;
  color: var(--ash);
}

.design-axiom {
  max-width: 940px;
  margin: clamp(76px, 10vw, 150px) 0 0 auto;
  padding-left: 30px;
  border-left: 1px solid var(--trace);
}

.design-axiom p {
  margin-bottom: 22px;
  font: 350 clamp(34px, 4.3vw, 64px) / 1.08 var(--editorial);
  text-wrap: balance;
}

.design-axiom footer {
  color: var(--trace);
  font: 8px var(--mono);
  letter-spacing: 0.1em;
}

.type-rationale {
  max-width: var(--content-max);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
}

.type-rationale article {
  min-height: 470px;
  display: flex;
  flex-direction: column;
  padding: clamp(24px, 3vw, 42px);
  border-right: 1px solid var(--line);
}

.type-rationale article:last-child {
  border-right: 0;
}

.type-id {
  color: var(--trace);
}

.type-display,
.type-editorial,
.type-mono {
  margin: 70px 0 auto;
}

.type-display {
  font-size: clamp(34px, 3.5vw, 54px);
  font-weight: 520;
  letter-spacing: -0.055em;
  line-height: 0.98;
}

.type-editorial {
  font: 350 clamp(34px, 3.7vw, 58px) / 1.02 var(--editorial);
}

.type-mono {
  color: var(--paper);
  font: 400 clamp(17px, 1.7vw, 24px) / 1.55 var(--mono);
  letter-spacing: 0.07em;
}

.type-rationale article > p:last-child {
  margin-bottom: 0;
  color: var(--ash);
  font-size: 13px;
}

.responsive-lab {
  max-width: var(--content-max);
  margin-top: 68px;
  border: 1px solid var(--line);
  background: var(--ink);
}

.responsive-lab > header {
  display: grid;
  grid-template-columns: 1fr auto minmax(180px, 0.45fr);
  gap: 24px;
  align-items: center;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
}

.responsive-lab header p {
  margin: 5px 0 0;
  color: var(--ash);
  font-size: 12px;
}

.responsive-lab label {
  color: var(--ash);
  font: 8px var(--mono);
}

.responsive-lab output {
  color: var(--paper);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--trace);
  cursor: ew-resize;
}

.responsive-stage {
  width: min(100%, var(--specimen-width));
  container-type: inline-size;
  margin: 48px auto;
  padding: clamp(24px, 5vw, 70px);
  border: 1px solid var(--line-strong);
  background: #050505;
  transition: width 220ms var(--ease-out);
}

.responsive-stage article > span {
  color: var(--trace);
  font: 7px var(--mono);
  letter-spacing: 0.1em;
}

.responsive-stage h3 {
  max-width: 13ch;
  margin: 42px 0 24px;
  font-size: clamp(44px, 8cqw, 96px);
  letter-spacing: -0.06em;
  line-height: 0.93;
}

.responsive-stage p {
  max-width: 42ch;
  margin: 0;
  color: var(--ash);
  font-size: clamp(14px, 2.3cqw, 20px);
}

@container (max-width: 430px) {
  .responsive-stage h3 {
    max-width: 10ch;
    margin-top: 70px;
    font-size: 12cqw;
  }
  .responsive-stage p {
    font-size: 4.2cqw;
  }
}

.measure-rules {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 0;
  border-top: 1px solid var(--line);
}

.measure-rules div {
  padding: 16px;
  border-right: 1px solid var(--line);
}

.measure-rules div:last-child {
  border-right: 0;
}

.measure-rules dt,
.measure-rules dd {
  font-family: var(--mono);
  font-size: 8px;
}

.measure-rules dt {
  color: var(--trace);
}

.measure-rules dd {
  margin: 5px 0 0;
  color: var(--ash);
}

.palette-grid {
  max-width: var(--content-max);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border: solid var(--line);
  border-width: 1px 0 0 1px;
}

.swatch {
  min-height: 300px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 20px;
  border: solid var(--line);
  border-width: 0 1px 1px 0;
}

.swatch span {
  margin-bottom: auto;
  font: 7px var(--mono);
  letter-spacing: 0.08em;
}

.swatch b {
  font: 400 19px var(--mono);
}

.swatch p {
  min-height: 38px;
  margin: 9px 0 0;
  font-size: 11px;
}

.swatch--void { background: #030303; color: var(--paper); }
.swatch--ink { background: #090909; color: var(--paper); }
.swatch--paper { background: #f2f1ed; color: #030303; }
.swatch--ash { background: #969694; color: #030303; }
.swatch--trace { background: var(--trace); color: var(--trace-ink); }

.palette-decision {
  max-width: var(--content-max);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8vw;
  align-items: end;
  margin-top: 80px;
}

.palette-decision > div:first-child {
  max-width: 600px;
}

.palette-decision p {
  color: var(--ash);
}

.contrast-table {
  border-top: 1px solid var(--line);
}

.contrast-table > div {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ash);
  font: 8px var(--mono);
}

.contrast-table b {
  color: var(--paper);
  font-weight: 500;
}

.space-stage {
  position: relative;
  max-width: var(--content-max);
  min-height: 680px;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    linear-gradient(rgba(255,255,255,.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.015) 1px, transparent 1px),
    #050505;
  background-size: 48px 48px;
}

.space-stage__safe {
  position: absolute;
  inset: 10% 34% 10% 8%;
  border: 1px dashed var(--line-strong);
}

.space-stage__safe span {
  position: absolute;
  top: -9px;
  left: 14px;
  padding: 0 7px;
  background: #050505;
  color: var(--ash-dark);
  font: 7px var(--mono);
}

.space-stage__copy {
  position: absolute;
  z-index: 2;
  left: 11%;
  bottom: 17%;
}

.space-stage__copy > span {
  color: var(--trace);
  font: 8px var(--mono);
  letter-spacing: 0.1em;
}

.space-stage__copy h3 {
  margin: 23px 0 0;
  font-size: clamp(42px, 6vw, 86px);
  letter-spacing: -0.06em;
  line-height: 0.94;
}

.space-stage__signal {
  position: absolute;
  right: 7%;
  top: 15%;
  width: 35%;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 50%;
  opacity: 0.75;
}

.space-stage__signal::before,
.space-stage__signal::after {
  content: "";
  position: absolute;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.space-stage__signal::before { inset: 18%; }
.space-stage__signal::after { inset: 37%; border-color: var(--trace); }

.space-stage__signal i {
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--trace);
}

.space-stage__signal i:nth-child(1) { top: 26%; left: 11%; }
.space-stage__signal i:nth-child(2) { top: 61%; left: 78%; }
.space-stage__signal i:nth-child(3) { top: 84%; left: 35%; }

.space-stage__measure {
  position: absolute;
  color: var(--ash-dark);
  font: 7px var(--mono);
  letter-spacing: 0.08em;
}

.measure-x {
  right: 5%;
  bottom: 3%;
  left: 5%;
  padding-top: 7px;
  border-top: 1px solid var(--line);
  text-align: center;
}

.measure-y {
  top: 6%;
  right: 2%;
  bottom: 6%;
  padding-left: 7px;
  border-left: 1px solid var(--line);
  writing-mode: vertical-rl;
  text-align: center;
}

.token-strip {
  max-width: var(--content-max);
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  margin-top: 28px;
  border: 1px solid var(--line);
}

.token-strip > div {
  min-height: 150px;
  display: flex;
  flex-direction: column;
  padding: 15px;
  border-right: 1px solid var(--line);
}

.token-strip > div:last-child { border-right: 0; }
.token-strip i { display: block; width: var(--token); height: var(--token); margin-bottom: auto; background: var(--trace); }
.token-strip span { font: 11px var(--mono); }
.token-strip small { margin-top: 4px; color: var(--ash); font-size: 9px; }

.layout-rules {
  max-width: var(--content-max);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin: 56px 0 0;
  border-top: 1px solid var(--line);
}

.layout-rules div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 20px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
}

.layout-rules div:nth-child(odd) { padding-right: 26px; }
.layout-rules div:nth-child(even) { padding-left: 26px; border-left: 1px solid var(--line); }
.layout-rules dt { color: var(--trace); font: 8px var(--mono); }
.layout-rules dd { margin: 0; color: var(--ash); font-size: 12px; }

.component-grid {
  max-width: var(--content-max);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border: solid var(--line);
  border-width: 1px 0 0 1px;
}

.component-specimen {
  min-height: 420px;
  display: flex;
  flex-direction: column;
  padding: 22px;
  border: solid var(--line);
  border-width: 0 1px 1px 0;
}

.component-label {
  color: var(--trace);
}

.component-specimen > footer {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--ash-dark);
  font: 7px var(--mono);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.mini-hero {
  margin: auto 0;
}

.mini-hero small {
  color: var(--trace);
  font: 7px var(--mono);
}

.mini-hero h3 {
  margin: 23px 0;
  font-size: clamp(30px, 3.5vw, 52px);
  letter-spacing: -0.05em;
}

.mini-hero a,
.instrument-node a {
  color: var(--paper);
  font: 8px var(--mono);
  text-transform: uppercase;
}

.instrument-node {
  position: relative;
  width: min(100%, 470px);
  min-height: 250px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  margin: auto;
  padding: 30px;
  border: 1px solid var(--line);
}

.instrument-node i {
  position: absolute;
  top: 30px;
  right: 30px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--trace);
  transform: rotate(45deg);
}

.instrument-node > span {
  margin-bottom: auto;
  color: var(--trace);
  font: 7px var(--mono);
  letter-spacing: 0.1em;
}

.instrument-node h3 { max-width: 360px; }
.instrument-node p { margin: 0 0 24px; color: var(--ash); }

.editorial-link {
  display: grid;
  grid-template-columns: 36px 1fr auto;
  gap: 18px;
  align-items: start;
  margin: auto 0;
  padding: 24px 0;
  border: solid var(--line);
  border-width: 1px 0;
}

.editorial-link > span,
.editorial-link > b {
  color: var(--ash-dark);
  font: 7px var(--mono);
}

.editorial-link h3 {
  font: 360 clamp(27px, 3vw, 44px) / 1.05 var(--editorial);
}

.editorial-link p {
  margin: 0;
  color: var(--ash);
  font-size: 12px;
}

.inquiry-state {
  width: min(100%, 480px);
  margin: auto;
  padding: 28px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(145deg, rgba(var(--trace-rgb) / 0.055), transparent 58%);
}

.inquiry-state header {
  display: flex;
  justify-content: space-between;
  color: var(--trace);
  font: 7px var(--mono);
}

.inquiry-state p {
  margin: 54px 0 30px;
  font-size: 17px;
}

.inquiry-state ol {
  display: flex;
  gap: 7px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.inquiry-state li {
  padding: 5px 7px;
  border: 1px solid var(--line);
  color: var(--ash);
  font: 7px var(--mono);
}

.menu-specimen {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  margin: auto 0;
  padding: 15px 0;
  border: solid var(--line);
  border-width: 1px 0;
}

.menu-specimen__brand {
  font: 9px var(--mono);
  letter-spacing: 0.08em;
}

.menu-specimen nav {
  display: flex;
  gap: 17px;
}

.menu-specimen nav a {
  color: var(--ash);
  font-size: 10px;
  text-decoration: none;
}

.menu-specimen button {
  display: none;
}

.action-specimen {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  align-items: center;
  margin: auto 0;
}

.text-action {
  padding: 13px 0;
  color: var(--ash);
  font: 8px var(--mono);
  text-transform: uppercase;
}

.diagram-lab {
  max-width: var(--content-max);
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(260px, 0.5fr);
  border: 1px solid var(--line);
}

.diagram-stage {
  min-height: 610px;
  border-right: 1px solid var(--line);
  background:
    linear-gradient(rgba(255,255,255,.012) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.012) 1px, transparent 1px),
    #050505;
  background-size: 40px 40px;
}

.diagram-stage svg {
  width: 100%;
  height: 100%;
  min-height: 610px;
  display: none;
}

.js .diagram-stage.is-generated svg {
  display: block;
}

.js .diagram-stage.is-generated .diagram-fallback {
  display: none;
}

.diagram-fallback {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 54px;
}

.diagram-fallback li {
  padding: 15px;
  border: 1px solid var(--line);
  color: var(--ash);
}

.graph-edge {
  fill: none;
  stroke: rgba(242, 241, 237, 0.16);
  stroke-width: 1.2;
  vector-effect: non-scaling-stroke;
  transition: stroke 240ms ease, stroke-width 240ms ease, opacity 240ms ease;
}

.graph-edge.is-active {
  stroke: var(--trace);
  stroke-width: 1.8;
}

.graph-node rect {
  fill: #080808;
  stroke: rgba(242, 241, 237, 0.22);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
  transition: stroke 240ms ease, fill 240ms ease;
}

.graph-node text {
  fill: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
}

.graph-node .graph-kind {
  fill: var(--ash-dark);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.08em;
}

.graph-node.is-active rect {
  fill: rgba(var(--trace-rgb) / 0.08);
  stroke: var(--trace);
}

.graph-marker path {
  fill: none;
  stroke: var(--trace);
  stroke-width: 1;
}

.diagram-spec {
  display: flex;
  flex-direction: column;
  padding: 30px;
}

.diagram-spec dl {
  margin: 45px 0;
  border-top: 1px solid var(--line);
}

.diagram-spec dl > div {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.diagram-spec dt {
  color: var(--trace);
  font: 7px var(--mono);
}

.diagram-spec dd {
  margin: 0;
  color: var(--ash);
  font-size: 11px;
}

.diagram-spec .button {
  margin-top: auto;
}

.arrow-studies {
  max-width: var(--content-max);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 22px;
  border: 1px solid var(--line);
}

.arrow-studies article {
  padding: 21px;
  border-right: 1px solid var(--line);
}

.arrow-studies article:last-child { border-right: 0; }
.arrow-studies article > span { color: var(--trace); font: 7px var(--mono); }
.arrow-studies svg { width: 100%; margin: 22px 0 10px; }
.arrow-studies path, .arrow-studies circle { fill: none; stroke: var(--paper); stroke-width: 1; vector-effect: non-scaling-stroke; }
.arrow-studies .dash { stroke-dasharray: 3 4; }
.arrow-studies .faint-line { stroke: var(--ash-dark); }
.arrow-studies p { margin: 0; color: var(--ash); font-size: 11px; }

.motion-grammar {
  max-width: var(--content-max);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: solid var(--line);
  border-width: 1px 0 0 1px;
}

.motion-grammar article {
  min-height: 420px;
  display: flex;
  flex-direction: column;
  padding: 19px;
  border: solid var(--line);
  border-width: 0 1px 1px 0;
}

.motion-grammar article > span {
  color: var(--trace);
}

.motion-grammar h3 {
  margin-top: auto;
}

.motion-grammar p {
  min-height: 52px;
  margin-bottom: 0;
  color: var(--ash);
  font-size: 11px;
}

.motion-demo {
  position: relative;
  height: 180px;
  margin-top: 35px;
  overflow: hidden;
  background: #050505;
}

.motion-demo i,
.motion-demo b {
  position: absolute;
  display: block;
}

.motion-demo--reveal {
  background-image: radial-gradient(circle, rgba(var(--trace-rgb) / 0.4) 0 1px, transparent 1.2px);
  background-size: 11px 11px;
}

.motion-demo--reveal i {
  width: 75px;
  height: 75px;
  top: 50%;
  left: 50%;
  border: 1px solid var(--trace);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  animation: reveal-boundary 3.5s var(--ease-out) infinite alternate;
}

.motion-demo--reveal b {
  inset: 0;
  background: radial-gradient(circle at center, transparent 14%, #050505 42%);
  animation: reveal-field 3.5s var(--ease-out) infinite alternate;
}

@keyframes reveal-boundary { from { opacity: 0; transform: translate(-50%, -50%) scale(.45); } to { opacity: 1; transform: translate(-50%, -50%) scale(1); } }
@keyframes reveal-field { from { opacity: .2; } to { opacity: .92; } }

.motion-demo--route i {
  width: 8px;
  height: 8px;
  top: 50%;
  border: 1px solid var(--paper);
  border-radius: 50%;
}

.motion-demo--route i:nth-child(1) { left: 13%; }
.motion-demo--route i:nth-child(2) { left: 48%; transform: translateX(-50%); }
.motion-demo--route i:nth-child(3) { right: 13%; }
.motion-demo--route b { top: calc(50% + 3px); right: 16%; left: 16%; height: 1px; background: var(--trace); transform-origin: left; animation: route-form 3.5s var(--ease-out) infinite; }
@keyframes route-form { 0%, 12% { transform: scaleX(0); } 68%, 100% { transform: scaleX(1); } }

.motion-demo--admit i {
  width: 54px;
  height: 72px;
  top: 50%;
  left: 23%;
  border: 1px solid var(--ash-dark);
  transform: translateY(-50%);
}

.motion-demo--admit b {
  width: 72px;
  height: 72px;
  top: 50%;
  right: 19%;
  border: 1px solid var(--trace);
  transform: translateY(-50%);
  animation: evidence-admit 3.5s var(--ease-out) infinite alternate;
}

.motion-demo--admit::after {
  content: "";
  position: absolute;
  top: 50%;
  right: calc(19% + 72px);
  left: calc(23% + 54px);
  border-top: 1px dashed var(--trace);
}

@keyframes evidence-admit { from { background: transparent; box-shadow: none; } to { background: rgba(var(--trace-rgb) / .09); box-shadow: 0 0 34px rgba(var(--trace-rgb) / .08); } }

.motion-demo--rest i {
  width: 3px;
  height: 3px;
  top: 50%;
  border-radius: 50%;
  background: var(--paper);
  animation: rest-points 3.5s var(--ease-out) infinite alternate;
}

.motion-demo--rest i:nth-child(1) { left: 17%; }
.motion-demo--rest i:nth-child(2) { left: 48%; }
.motion-demo--rest i:nth-child(3) { left: 81%; }
.motion-demo--rest b { width: 10px; height: 10px; top: 50%; left: 50%; border: 1px solid var(--trace); transform: translate(-50%, -50%) rotate(45deg); }
@keyframes rest-points { from { opacity: 1; transform: translateX(0); } to { opacity: 0; transform: translateX(60px); } }

:root[data-motion="still"] .motion-demo *,
:root[data-runtime="static"] .motion-demo * {
  animation-play-state: paused !important;
}

.transition-score {
  max-width: var(--content-max);
  margin-top: 72px;
}

.transition-score ol {
  margin: 18px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.transition-score li {
  display: grid;
  grid-template-columns: minmax(120px, 0.5fr) minmax(240px, 1fr) minmax(150px, 0.55fr);
  gap: 24px;
  align-items: baseline;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.transition-score span,
.transition-score small {
  color: var(--ash);
  font: 8px var(--mono);
}

.transition-score b {
  font-size: 15px;
  font-weight: 500;
}

.shader-grid {
  max-width: var(--content-max);
  display: grid;
  gap: 26px;
}

.shader-card {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.55fr);
  min-height: 520px;
  border: 1px solid var(--line);
}

.shader-card figure {
  min-height: 520px;
  margin: 0;
  border: 0;
  border-right: 1px solid var(--line);
}

.shader-card__copy {
  display: flex;
  flex-direction: column;
  padding: clamp(28px, 4vw, 52px);
}

.shader-card__copy > span {
  color: var(--trace);
}

.shader-card__copy h3 {
  margin-top: 42px;
}

.shader-card__copy p {
  color: var(--ash);
  font-size: 13px;
}

.shader-card__copy dl {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin: auto 0 0;
  border: solid var(--line);
  border-width: 1px 0 0 1px;
}

.shader-card__copy dl > div {
  padding: 10px;
  border: solid var(--line);
  border-width: 0 1px 1px 0;
}

.shader-card__copy dt,
.shader-card__copy dd {
  font: 7px var(--mono);
}

.shader-card__copy dt { color: var(--ash-dark); }
.shader-card__copy dd { margin: 4px 0 0; color: var(--paper); }

.shader-fallback--dither {
  background-image:
    radial-gradient(circle at 67% 44%, transparent 0 19%, rgba(var(--trace-rgb) / .65) 20% 20.4%, transparent 21%),
    radial-gradient(circle, rgba(var(--trace-rgb) / .72) 0 1px, transparent 1.3px),
    linear-gradient(130deg, transparent 0 35%, rgba(var(--trace-rgb) / .14) 64%, transparent 100%);
  background-size: 100% 100%, 7px 7px, 100% 100%;
  mask-image: linear-gradient(105deg, transparent 3%, #000 36% 100%);
}

.shader-fallback--halftone {
  background-image:
    radial-gradient(circle, rgba(var(--trace-rgb) / .76) 0 28%, transparent 30%),
    radial-gradient(circle at 38% 48%, rgba(var(--trace-rgb) / .15), transparent 28%);
  background-size: 12px 12px, 100% 100%;
  transform: scale(1.08) rotate(-3deg);
  mask-image: radial-gradient(ellipse at 45% 50%, #000, transparent 72%);
}

.shader-fallback--path {
  background-image: radial-gradient(circle, rgba(var(--trace-rgb) / .46) 0 1px, transparent 1.3px);
  background-size: 10px 10px;
  mask-image: linear-gradient(to bottom, transparent 2%, #000 30% 70%, transparent 98%);
}

.shader-fallback--path::before {
  top: 48%;
  right: 12%;
  left: 12%;
  height: 1px;
  background: var(--trace);
  transform: rotate(-8deg);
}

.shader-fallback--path i {
  position: absolute;
  width: 12px;
  height: 12px;
  border: 1px solid var(--trace);
  border-radius: 50%;
}

.shader-fallback--path i:nth-child(1) { top: 59%; left: 17%; }
.shader-fallback--path i:nth-child(2) { top: 48%; left: 49%; }
.shader-fallback--path i:nth-child(3) { top: 35%; right: 17%; }

.shader-fallback--latent {
  background-image:
    radial-gradient(circle at 8% 17%, rgba(var(--trace-rgb) / .28) 0 1px, transparent 1.2px),
    radial-gradient(circle at 24% 79%, rgba(var(--trace-rgb) / .18) 0 1px, transparent 1.2px),
    radial-gradient(circle at 43% 31%, rgba(var(--trace-rgb) / .24) 0 1px, transparent 1.2px),
    radial-gradient(circle at 67% 66%, rgba(var(--trace-rgb) / .32) 0 1px, transparent 1.2px),
    radial-gradient(circle at 89% 23%, rgba(var(--trace-rgb) / .2) 0 1px, transparent 1.2px),
    radial-gradient(circle, rgba(var(--trace-rgb) / .1) 0 1px, transparent 1.2px);
  background-size: 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 23px 23px;
  mask-image: radial-gradient(ellipse at 56% 48%, #000 0 28%, transparent 82%);
}

.ambient-depth-score {
  max-width: var(--content-max);
  margin-top: 80px;
  border-top: 1px solid var(--line);
}

.ambient-depth-score > header {
  display: grid;
  grid-template-columns: minmax(260px, .7fr) minmax(360px, 1fr);
  gap: 12px 8vw;
  align-items: end;
  padding: 42px 0;
}

.ambient-depth-score > header > span { grid-column: 1 / -1; }
.ambient-depth-score h3 { margin: 0; }
.ambient-depth-score header p { max-width: 620px; margin: 0; color: var(--ash); font-size: 12px; }

.ambient-depth-score ol {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0;
  padding: 0;
  border: solid var(--line);
  border-width: 1px 0 0 1px;
  list-style: none;
}

.ambient-depth-score li {
  position: relative;
  min-height: 210px;
  display: flex;
  align-items: end;
  overflow: hidden;
  padding: 20px;
  border: solid var(--line);
  border-width: 0 1px 1px 0;
  background: #030303;
}

.ambient-depth-score li i {
  position: absolute;
  inset: 0;
  opacity: var(--score-opacity, .46);
  background-image:
    radial-gradient(circle at 13% 24%, rgba(var(--trace-rgb) / .58) 0 1px, transparent 1.2px),
    radial-gradient(circle at 29% 71%, rgba(var(--trace-rgb) / .3) 0 1px, transparent 1.2px),
    radial-gradient(circle at 58% 17%, rgba(var(--trace-rgb) / .42) 0 1px, transparent 1.2px),
    radial-gradient(circle at 76% 63%, rgba(var(--trace-rgb) / .68) 0 1px, transparent 1.2px),
    radial-gradient(circle at 91% 31%, rgba(var(--trace-rgb) / .34) 0 1px, transparent 1.2px),
    radial-gradient(circle, rgba(var(--trace-rgb) / .12) 0 .7px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 47px 53px;
  mask-image: var(--score-mask, radial-gradient(circle at 68% 38%, #000, transparent 72%));
}

.ambient-depth-score li div { position: relative; z-index: 1; display: grid; gap: 3px; }
.ambient-depth-score li span,
.ambient-depth-score li small { color: var(--ash-dark); font: 7px var(--mono); }
.ambient-depth-score li b { font-size: 17px; font-weight: 500; }

.ambient-depth-score [data-depth-state="work"] { --score-opacity: .56; --score-mask: radial-gradient(circle at 32% 42%, #000, transparent 64%); }
.ambient-depth-score [data-depth-state="lineage"] { --score-opacity: .42; --score-mask: linear-gradient(145deg, transparent 8%, #000 32% 62%, transparent 86%); }
.ambient-depth-score [data-depth-state="writing"] { --score-opacity: .25; --score-mask: linear-gradient(90deg, #000 0 12%, transparent 38% 66%, #000 100%); }
.ambient-depth-score [data-depth-state="organon"] { --score-opacity: .48; --score-mask: linear-gradient(155deg, transparent 4%, #000 26% 72%, transparent 94%); }
.ambient-depth-score [data-depth-state="studio"] { --score-opacity: .72; --score-mask: radial-gradient(ellipse at 50% 52%, #000, transparent 88%); }
.ambient-depth-score [data-depth-state="now"] { --score-opacity: .38; --score-mask: repeating-linear-gradient(0deg, transparent 0 23%, #000 24% 28%, transparent 29% 35%); }
.ambient-depth-score [data-depth-state="contact"] { --score-opacity: .1; --score-mask: radial-gradient(circle at 82% 22%, #000, transparent 42%); }
.ambient-depth-score [data-depth-state="signature"] { --score-opacity: .34; --score-mask: radial-gradient(circle at 70% 36%, #000 0 5%, transparent 34%); }

.shader-mixer {
  max-width: var(--content-max);
  display: grid;
  grid-template-columns: 1fr auto minmax(240px, .65fr);
  gap: 28px;
  align-items: center;
  margin-top: 30px;
  padding: 24px;
  border: 1px solid var(--line);
}

.shader-mixer h3 { margin: 11px 0 6px; }
.shader-mixer p { max-width: 650px; margin: 0; color: var(--ash); font-size: 12px; }
.shader-mixer label { color: var(--ash); font: 8px var(--mono); }
.shader-mixer output { color: var(--paper); }

.budget-grid {
  max-width: var(--content-max);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: solid var(--line);
  border-width: 1px 0 0 1px;
}

.budget-grid article {
  min-height: 220px;
  display: flex;
  flex-direction: column;
  padding: 24px;
  border: solid var(--line);
  border-width: 0 1px 1px 0;
}

.budget-grid article > span { color: var(--trace); }
.budget-grid b { margin: auto 0 8px; font-size: clamp(28px, 3vw, 44px); font-weight: 480; letter-spacing: -.04em; }
.budget-grid p { margin: 0; color: var(--ash); font-size: 11px; }

.quality-contract {
  max-width: var(--content-max);
  margin-top: 54px;
  overflow-x: auto;
}

.quality-contract table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
}

.quality-contract caption {
  margin-bottom: 15px;
  color: var(--trace);
  font: 8px var(--mono);
  letter-spacing: 0.1em;
  text-align: left;
  text-transform: uppercase;
}

.quality-contract th,
.quality-contract td {
  padding: 13px;
  border: 1px solid var(--line);
  text-align: left;
}

.quality-contract th {
  color: var(--ash-dark);
  font: 7px var(--mono);
  text-transform: uppercase;
}

.quality-contract td {
  color: var(--ash);
  font-size: 11px;
}

.quality-contract td:first-child { color: var(--paper); font-family: var(--mono); }

.fallback-comparison {
  max-width: var(--content-max);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8vw;
  margin-top: 80px;
  padding-top: 50px;
  border-top: 1px solid var(--line);
}

.fallback-comparison p { max-width: 580px; color: var(--ash); }
.fallback-checklist { display: grid; align-content: start; border-top: 1px solid var(--line); }
.fallback-checklist span { padding: 12px 0; border-bottom: 1px solid var(--line); color: var(--ash); font: 8px var(--mono); }

.scene-map {
  max-width: var(--content-max);
  border-top: 1px solid var(--line);
}

.scene-map article {
  display: grid;
  grid-template-columns: 48px 1fr minmax(190px, .5fr);
  gap: 24px;
  align-items: center;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
}

.scene-map article > span,
.scene-map small {
  color: var(--ash-dark);
  font: 8px var(--mono);
}

.scene-map b { font-size: 16px; font-weight: 520; }
.scene-map p { margin: 2px 0 0; color: var(--ash); font-size: 11px; }
.scene-map small { text-align: right; }

.music-scene-spec {
  max-width: var(--content-max);
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(300px, .55fr);
  margin-top: 72px;
  border: 1px solid var(--line);
}

.music-scene-frame {
  position: relative;
  min-height: 620px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  padding: 28px;
  border-right: 1px solid var(--line);
  background: #040404;
}

.music-scene-frame > span,
.music-scene-frame small {
  position: relative;
  z-index: 1;
  color: var(--trace);
  font: 8px var(--mono);
  letter-spacing: .08em;
}

.music-scene-frame > div:not(.music-scene-frame__signal) {
  position: relative;
  z-index: 1;
  max-width: 620px;
}

.music-scene-frame h3 {
  max-width: 11ch;
  margin: 16px 0;
  font: 380 clamp(42px, 6vw, 82px)/.94 var(--serif);
  letter-spacing: -.045em;
}

.music-scene-frame p { max-width: 42ch; color: var(--ash); }

.music-scene-frame__signal {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  gap: clamp(12px, 3vw, 38px);
  padding: 0 6%;
  opacity: .4;
  mask-image: linear-gradient(90deg, transparent 0%, #000 44%, #000 100%);
}

.music-scene-frame__signal::after {
  content: "";
  position: absolute;
  right: 5%;
  left: 5%;
  height: 1px;
  background: var(--trace);
}

.music-scene-frame__signal i {
  z-index: 1;
  width: 1px;
  height: var(--wave, 80px);
  flex: 1;
  background: var(--trace);
}

.music-scene-frame__signal i:nth-child(2) { --wave: 180px; }
.music-scene-frame__signal i:nth-child(3) { --wave: 110px; }
.music-scene-frame__signal i:nth-child(4) { --wave: 260px; }
.music-scene-frame__signal i:nth-child(5) { --wave: 150px; }
.music-scene-frame__signal i:nth-child(6) { --wave: 210px; }
.music-scene-frame__signal i:nth-child(7) { --wave: 70px; }

.music-scene-spec aside { padding: 28px; }
.music-scene-spec dl { margin: 38px 0 0; border-top: 1px solid var(--line); }
.music-scene-spec dl > div { padding: 13px 0; border-bottom: 1px solid var(--line); }
.music-scene-spec dt { color: var(--trace); font: 7px var(--mono); text-transform: uppercase; }
.music-scene-spec dd { margin: 4px 0 0; color: var(--ash); font-size: 11px; }

.decision-gates {
  max-width: 900px;
  margin: 100px 0 0 auto;
}

.decision-gates ol {
  margin: 18px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
  counter-reset: gate;
}

.decision-gates li {
  counter-increment: gate;
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 15px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

.decision-gates li::before {
  content: "0" counter(gate);
  color: var(--trace);
  font: 8px var(--mono);
}

.document-footer {
  max-width: var(--content-max);
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 30px;
  margin-top: 140px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.document-footer > div {
  display: flex;
  align-items: center;
  gap: 13px;
}

.document-footer__mark { width: 14px; height: 14px; }
.document-footer p { margin: 0; color: var(--ash); font: 8px var(--mono); }
.document-footer nav { display: flex; flex-wrap: wrap; gap: 20px; }
.document-footer nav a { color: var(--ash); font: 8px var(--mono); text-transform: uppercase; }

.noscript-banner {
  position: fixed;
  z-index: 50;
  right: 16px;
  bottom: 16px;
  max-width: 390px;
  padding: 12px 14px;
  border: 1px solid var(--line-strong);
  background: var(--ink-raised);
  color: var(--ash);
  font: 8px var(--mono);
}

@media (max-width: 1120px) {
  :root { --rail: 216px; }
  .review-rail { padding-inline: 17px; }
  .hero__copy { width: 66vw; }
  .type-rationale { grid-template-columns: 1fr; }
  .type-rationale article { min-height: 330px; border-right: 0; border-bottom: 1px solid var(--line); }
  .type-rationale article:last-child { border-bottom: 0; }
  .type-display, .type-editorial, .type-mono { margin: 50px 0 32px; }
  .palette-grid { grid-template-columns: repeat(3, 1fr); }
  .palette-grid .swatch:nth-child(n+4) { min-height: 220px; }
  .motion-grammar { grid-template-columns: repeat(2, 1fr); }
  .shader-card { grid-template-columns: 1fr; }
  .shader-card figure { min-height: 470px; border-right: 0; border-bottom: 1px solid var(--line); }
  .shader-card__copy { min-height: 360px; }
  .ambient-depth-score > header { grid-template-columns: 1fr; }
  .ambient-depth-score ol { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 820px) {
  :root { --rail: 0px; }
  body::before { display: none; }
  .review-rail {
    position: sticky;
    top: 0;
    width: 100%;
    height: auto;
    display: grid;
    grid-template-columns: 1fr auto;
    padding: 11px 14px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .rail-brand { padding: 0; border: 0; }
  .rail-brand__mark { width: 17px; height: 17px; }
  .rail-label, .rail-nav, .rail-controls fieldset, .rail-meta { display: none; }
  .rail-controls { margin: 0; }
  .rail-toggle { min-width: 116px; }
  main { margin-left: 0; }
  .chapter { min-height: auto; padding: 96px 20px; }
  .hero { min-height: 100svh; padding-top: 118px; }
  .hero__copy { width: 100%; }
  .hero__stage { position: relative; top: auto; right: auto; width: 100%; height: 52vw; min-height: 360px; margin-top: 70px; }
  .hero__thesis { margin-top: 50px; }
  .split-heading { grid-template-columns: 1fr; gap: 28px; }
  .split-heading > p { max-width: 650px; }
  .principle-grid, .component-grid { grid-template-columns: 1fr; }
  .palette-decision, .fallback-comparison { grid-template-columns: 1fr; gap: 42px; }
  .space-stage { min-height: 560px; }
  .space-stage__safe { right: 18%; }
  .token-strip { grid-template-columns: repeat(3, 1fr); }
  .token-strip > div { border-bottom: 1px solid var(--line); }
  .layout-rules { grid-template-columns: 1fr; }
  .layout-rules div:nth-child(odd), .layout-rules div:nth-child(even) { padding-inline: 0; border-left: 0; }
  .diagram-lab { grid-template-columns: 1fr; }
  .diagram-stage { border-right: 0; border-bottom: 1px solid var(--line); }
  .arrow-studies { grid-template-columns: 1fr; }
  .arrow-studies article { border-right: 0; border-bottom: 1px solid var(--line); }
  .arrow-studies article:last-child { border-bottom: 0; }
  .shader-mixer { grid-template-columns: 1fr; }
  .budget-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .chapter { padding: 88px 14px; }
  h1 { font-size: clamp(52px, 17vw, 78px); }
  h2 { font-size: clamp(44px, 15vw, 68px); }
  .hero__stage { height: 115vw; min-height: 390px; }
  .hero__thesis { grid-template-columns: 1fr; gap: 12px; }
  .principle-grid article { min-height: 230px; }
  .responsive-lab > header { grid-template-columns: 1fr; }
  .responsive-stage { margin-block: 24px; }
  .measure-rules { grid-template-columns: repeat(2, 1fr); }
  .palette-grid { grid-template-columns: 1fr 1fr; }
  .swatch { min-height: 220px; }
  .palette-grid .swatch:last-child { grid-column: 1 / -1; }
  .contrast-table > div { grid-template-columns: 1fr auto; }
  .contrast-table > div span:last-child { grid-column: 1 / -1; }
  .space-stage { min-height: 500px; }
  .space-stage__safe { inset: 12% 10%; }
  .space-stage__copy { left: 8%; bottom: 12%; }
  .space-stage__signal { right: -10%; width: 62%; }
  .token-strip { grid-template-columns: 1fr 1fr; }
  .component-specimen { min-height: 380px; padding: 16px; }
  .editorial-link { grid-template-columns: 26px 1fr; }
  .editorial-link > b { grid-column: 2; }
  .menu-specimen nav { display: none; }
  .menu-specimen button { display: flex; min-height: 44px; align-items: center; gap: 7px; border: 0; background: transparent; color: var(--paper); font: 8px var(--mono); }
  .menu-specimen button i { width: 14px; height: 8px; border: solid currentColor; border-width: 1px 0; }
  .menu-specimen.is-open nav {
    position: absolute;
    z-index: 2;
    top: calc(100% + 1px);
    right: 0;
    left: 0;
    display: grid;
    padding: 14px;
    border: 1px solid var(--line-strong);
    background: var(--ink);
  }
  .menu-specimen.is-open nav a { min-height: 44px; display: flex; align-items: center; border-bottom: 1px solid var(--line); }
  .menu-specimen.is-open nav a:last-child { border-bottom: 0; }
  .menu-specimen button[aria-expanded="true"] i { height: 1px; border-width: 1px 0 0; transform: rotate(45deg); }
  .diagram-stage, .diagram-stage svg { min-height: 430px; }
  .js .diagram-stage.is-generated svg { display: none; }
  .js .diagram-stage.is-generated .diagram-fallback { display: grid; }
  .diagram-fallback { padding: 20px; }
  .motion-grammar { grid-template-columns: 1fr; }
  .motion-grammar article { min-height: 360px; }
  .transition-score li { grid-template-columns: 1fr; gap: 5px; }
  .shader-card figure { min-height: 420px; }
  .shader-card__copy { padding: 24px; }
  .ambient-depth-score ol { grid-template-columns: 1fr; }
  .ambient-depth-score li { min-height: 170px; }
  .budget-grid { grid-template-columns: 1fr; }
  .scene-map article { grid-template-columns: 35px 1fr; gap: 12px; }
  .scene-map small { grid-column: 2; text-align: left; }
  .music-scene-spec { grid-template-columns: 1fr; }
  .music-scene-frame { min-height: 520px; border-right: 0; border-bottom: 1px solid var(--line); }
  .document-footer { align-items: start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  .review-rail, .shader-specimen canvas, .chapter-ruler { display: none !important; }
  main { margin-left: 0; }
  body { background: #fff; color: #111; }
  .chapter { min-height: auto; padding: 48px 30px; break-inside: avoid; border-color: #ccc; }
  .shader-fallback { display: block !important; }
}