/* Operational Observatory. All component values resolve through tokens.css. */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--colour-black); }
body {
  margin: 0;
  min-width: 20rem;
  background: var(--colour-black);
  color: var(--colour-pale);
  font-family: var(--font-body);
  font-size: var(--type-body);
  font-weight: var(--weight-regular);
  line-height: var(--leading-body);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  inset: 0 auto 0 var(--space-page);
  width: var(--size-rule);
  background: var(--colour-charcoal);
  pointer-events: none;
  z-index: var(--z-base);
}
::selection { background: var(--colour-white); color: var(--colour-black); }
a { color: inherit; }
button, input, textarea, select { font: inherit; }
button { color: inherit; }
img, svg { display: block; max-width: 100%; }
p, h1, h2, h3, h4, ul, ol, dl, dd, figure, blockquote { margin: 0; }
ul, ol { padding: 0; }
:focus-visible { outline: var(--size-rule-strong) solid var(--colour-focus); outline-offset: var(--space-025); }
.skip-link {
  position: fixed;
  top: var(--space-100);
  left: var(--space-100);
  z-index: var(--z-focus);
  padding: var(--space-075) var(--space-100);
  background: var(--colour-white);
  color: var(--colour-black);
  transform: translateY(-160%);
  transition-property: transform;
  transition-duration: var(--motion-fast);
  transition-timing-function: var(--ease-sharp);
}
.skip-link:focus { transform: translateY(0); }
.site-shell { width: min(100%, var(--measure-site)); margin-inline: auto; padding-inline: var(--space-page); }
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  min-height: var(--size-header);
  background: var(--colour-black);
  border-bottom: var(--size-rule) solid var(--colour-charcoal);
}
.header-inner { min-height: var(--size-header); display: flex; align-items: stretch; justify-content: space-between; }
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-100);
  min-width: max-content;
  padding-right: var(--space-150);
  border-right: var(--size-rule) solid var(--colour-charcoal);
  text-decoration: none;
}
.brand-name {
  font-family: var(--font-display);
  font-size: var(--type-small);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  line-height: var(--leading-label);
}
.brand-index { color: var(--colour-muted); font-family: var(--font-utility); font-size: var(--type-micro); letter-spacing: var(--tracking-wide); }
.primary-nav { display: flex; align-items: stretch; margin-left: auto; }
.nav-list { display: flex; align-items: stretch; list-style: none; }
.nav-link {
  display: grid;
  place-items: center;
  min-height: var(--size-touch);
  padding-inline: var(--space-125);
  color: var(--colour-muted);
  border-left: var(--size-rule) solid var(--colour-charcoal);
  font-family: var(--font-utility);
  font-size: var(--type-label);
  letter-spacing: var(--tracking-wide);
  text-decoration: none;
  text-transform: uppercase;
  transition-property: color, background-color;
  transition-duration: var(--motion-fast);
  transition-timing-function: var(--ease-standard);
}
.nav-link:hover, .nav-link[aria-current="page"] { color: var(--colour-white); background: var(--colour-graphite); }
.nav-link:active { background: var(--colour-steel); }
.nav-link.nav-action { color: var(--colour-black); background: var(--colour-pale); }
.nav-link.nav-action:hover, .nav-link.nav-action:active { color: var(--colour-black); background: var(--colour-white); }
.menu-toggle {
  display: none;
  min-width: var(--size-touch);
  min-height: var(--size-touch);
  padding: var(--space-075);
  border: 0;
  border-left: var(--size-rule) solid var(--colour-charcoal);
  background: transparent;
  cursor: pointer;
}
.menu-lines, .menu-lines::before, .menu-lines::after { display: block; width: var(--space-150); height: var(--size-rule); background: currentColor; }
.menu-lines { position: relative; margin-inline: auto; }
.menu-lines::before, .menu-lines::after { content: ""; position: absolute; left: 0; }
.menu-lines::before { top: calc(var(--space-050) * -1); }
.menu-lines::after { top: var(--space-050); }
main { overflow: clip; }
.section { position: relative; padding-block: var(--space-section); border-bottom: var(--size-rule) solid var(--colour-charcoal); }
.section-compact { padding-block: var(--space-600); }
.section-dark { background: var(--colour-ink); }
.section-pale { background: var(--colour-pale); color: var(--colour-black); }
.section-marker {
  position: absolute;
  top: var(--space-200);
  right: var(--space-page);
  color: var(--colour-mid);
  font-family: var(--font-utility);
  font-size: var(--type-micro);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  writing-mode: vertical-rl;
}
.grid-12 { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--space-150); row-gap: var(--space-300); }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: 1 / -1; }
.span-6.start-7 { grid-column: 7 / span 6; }
.span-7.start-6 { grid-column: 6 / span 7; }
.eyebrow, .utility-label {
  color: var(--colour-muted);
  font-family: var(--font-utility);
  font-size: var(--type-label);
  font-weight: var(--weight-regular);
  letter-spacing: var(--tracking-wider);
  line-height: var(--leading-label);
  text-transform: uppercase;
}
.eyebrow { display: flex; align-items: center; gap: var(--space-075); }
.eyebrow::before { content: ""; width: var(--space-200); height: var(--size-rule); background: currentColor; }
.display, .page-title, .section-title, .subsection-title {
  font-family: var(--font-display);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-tight);
  text-wrap: balance;
}
.display { font-size: var(--type-display); line-height: var(--leading-tight); }
.page-title { max-width: var(--measure-wide); font-size: var(--type-page); line-height: var(--leading-tight); }
.section-title { font-size: var(--type-section); line-height: var(--leading-tight); }
.subsection-title { font-size: var(--type-subsection); line-height: var(--leading-snug); }
.lead { max-width: var(--measure-copy); color: var(--colour-silver); font-size: var(--type-lead); line-height: var(--leading-body); }
.copy { max-width: var(--measure-copy); color: var(--colour-silver); }
.copy + .copy { margin-top: var(--space-100); }
.section-pale .copy, .section-pale .lead { color: var(--colour-steel); }
.section-pale .eyebrow, .section-pale .utility-label, .section-pale .register-code, .section-pale .principle-number { color: var(--colour-mid); }
.section-pale .register-copy, .section-pale .principle-item p { color: var(--colour-steel); }
.section-pale .status { color: var(--colour-steel); }
.text-link, .action-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-075);
  min-height: var(--size-touch);
  color: var(--colour-white);
  font-family: var(--font-utility);
  font-size: var(--type-small);
  letter-spacing: var(--tracking-wide);
  text-decoration: none;
  text-transform: uppercase;
}
.text-link::after, .action-link::after { content: "↗"; font-size: var(--type-body); transition-property: transform; transition-duration: var(--motion-fast); transition-timing-function: var(--ease-standard); }
.text-link:hover::after, .action-link:hover::after { transform: translate(var(--space-025), calc(var(--space-025) * -1)); }
.text-link:active::after, .action-link:active::after { transform: translate(0, 0); }
.action-link {
  padding: var(--space-100) var(--space-150);
  background: var(--colour-pale);
  color: var(--colour-black);
  clip-path: polygon(0 0, 91% 0, 100% 27%, 100% 100%, 0 100%);
  transition-property: background-color, transform;
  transition-duration: var(--motion-fast);
  transition-timing-function: var(--ease-standard);
}
.action-link:hover { background: var(--colour-white); }
.action-link:active { transform: translateY(var(--size-rule-strong)); }
.section-pale .text-link { color: var(--colour-black); }
.hero { min-height: calc(100svh - var(--size-header)); display: grid; align-items: stretch; border-bottom: var(--size-rule) solid var(--colour-charcoal); }
.hero-inner { display: grid; grid-template-columns: minmax(0, 7fr) minmax(22rem, 5fr); min-height: inherit; }
.hero-copy { display: flex; flex-direction: column; justify-content: space-between; gap: var(--space-500); padding: clamp(4rem, 8vw, 8rem) var(--space-400) var(--space-300) 0; }
.hero-title-group { display: grid; gap: var(--space-200); }
.hero-actions { display: flex; align-items: center; gap: var(--space-200); flex-wrap: wrap; }
.hero-meta { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: var(--size-rule) solid var(--colour-charcoal); }
.hero-meta-item { padding: var(--space-100) var(--space-100) 0 0; }
.hero-meta-item + .hero-meta-item { padding-left: var(--space-100); border-left: var(--size-rule) solid var(--colour-charcoal); }
.hero-meta dt { color: var(--colour-muted); font-family: var(--font-utility); font-size: var(--type-micro); letter-spacing: var(--tracking-wide); text-transform: uppercase; }
.hero-meta dd { margin-top: var(--space-025); color: var(--colour-pale); font-size: var(--type-small); line-height: var(--leading-label); }
.aperture {
  position: relative;
  min-height: var(--size-aperture);
  overflow: hidden;
  border-inline: var(--size-rule) solid var(--colour-charcoal);
  background: var(--colour-ink);
  isolation: isolate;
}
.aperture::before {
  content: "";
  position: absolute;
  inset: var(--space-200) var(--space-200) var(--space-200) var(--space-150);
  z-index: calc(var(--z-base) + 1);
  border: var(--size-rule) solid var(--colour-steel);
  clip-path: polygon(0 0, 84% 0, 100% 13%, 100% 100%, 17% 100%, 0 86%);
  pointer-events: none;
}
.aperture::after {
  content: "OBSERVATION FIELD / LIVE MODEL";
  position: absolute;
  top: var(--space-300);
  right: var(--space-300);
  z-index: calc(var(--z-base) + 2);
  color: var(--colour-muted);
  font-family: var(--font-utility);
  font-size: var(--type-micro);
  letter-spacing: var(--tracking-wider);
  writing-mode: vertical-rl;
}
.aperture-grid { display: grid; grid-template-rows: repeat(4, minmax(0, 1fr)); min-height: 100%; }
.aperture-layer {
  display: grid;
  grid-template-columns: var(--space-500) minmax(0, 1fr);
  align-items: center;
  gap: var(--space-125);
  min-height: calc(var(--size-aperture) / 4);
  padding: var(--space-125) var(--space-500) var(--space-125) var(--space-250);
  border-bottom: var(--size-rule) solid var(--colour-charcoal);
}
.aperture-layer:last-child { border-bottom: 0; }
.aperture-layer:nth-child(2) { background: var(--colour-graphite); margin-left: var(--space-200); }
.aperture-layer:nth-child(3) { background: var(--colour-charcoal); margin-left: var(--space-400); }
.aperture-layer:nth-child(4) { background: var(--colour-pale); color: var(--colour-black); margin-left: var(--space-600); }
.aperture-code { font-family: var(--font-utility); font-size: var(--type-label); letter-spacing: var(--tracking-wide); }
.aperture-text strong { display: block; font-family: var(--font-display); font-size: var(--type-lead); line-height: var(--leading-snug); }
.aperture-text span { display: block; margin-top: var(--space-025); color: var(--colour-muted); font-size: var(--type-small); line-height: var(--leading-label); }
.aperture-layer:nth-child(4) .aperture-text span { color: var(--colour-steel); }
.aperture-scan {
  position: absolute;
  inset: 0 auto 0 0;
  z-index: calc(var(--z-base) + 3);
  width: var(--size-rail);
  background: var(--colour-white);
  animation: aperture-scan var(--motion-scan) var(--ease-standard) infinite;
  pointer-events: none;
}
@keyframes aperture-scan {
  0%, 12% { transform: translateX(0); opacity: 0; }
  18% { opacity: 1; }
  66% { transform: translateX(calc(var(--size-aperture) * 1.5)); opacity: 1; }
  72%, 100% { transform: translateX(calc(var(--size-aperture) * 1.5)); opacity: 0; }
}
.statement-band { display: grid; grid-template-columns: minmax(14rem, 3fr) minmax(0, 9fr); border-bottom: var(--size-rule) solid var(--colour-charcoal); }
.statement-index { padding: var(--space-300) var(--space-250) var(--space-300) 0; border-right: var(--size-rule) solid var(--colour-charcoal); }
.statement-copy { padding: var(--space-300) 0 var(--space-300) var(--space-300); font-family: var(--font-display); font-size: var(--type-section); font-weight: var(--weight-medium); letter-spacing: var(--tracking-tight); line-height: var(--leading-snug); }
.statement-copy em { color: var(--colour-muted); font-style: normal; }
.tabs-shell { border-top: var(--size-rule) solid var(--colour-steel); }
.tab-list { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-bottom: var(--size-rule) solid var(--colour-steel); }
.tab-button {
  min-height: calc(var(--size-touch) * 1.7);
  padding: var(--space-100) var(--space-125);
  border: 0;
  border-right: var(--size-rule) solid var(--colour-steel);
  background: transparent;
  color: var(--colour-muted);
  text-align: left;
  cursor: pointer;
  transition-property: color, background-color;
  transition-duration: var(--motion-fast);
  transition-timing-function: var(--ease-standard);
}
.tab-button:last-child { border-right: 0; }
.tab-button:hover { color: var(--colour-white); background: var(--colour-graphite); }
.tab-button:active { background: var(--colour-steel); }
.tab-button[aria-selected="true"] { background: var(--colour-pale); color: var(--colour-black); }
.tab-code { display: block; font-family: var(--font-utility); font-size: var(--type-micro); letter-spacing: var(--tracking-wider); }
.tab-name { display: block; margin-top: var(--space-050); font-family: var(--font-display); font-size: var(--type-lead); line-height: var(--leading-snug); }
.tab-panels { min-height: 27rem; }
.tab-panel { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); min-height: inherit; }
.tab-panel[hidden] { display: none; }
.tab-panel-title { display: flex; flex-direction: column; justify-content: space-between; gap: var(--space-300); padding: var(--space-300) var(--space-300) var(--space-300) 0; border-right: var(--size-rule) solid var(--colour-steel); }
.tab-panel-body { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-content: start; }
.fact-block { padding: var(--space-250); border-bottom: var(--size-rule) solid var(--colour-steel); }
.fact-block:nth-child(odd) { border-right: var(--size-rule) solid var(--colour-steel); }
.fact-block dt { color: var(--colour-muted); font-family: var(--font-utility); font-size: var(--type-micro); letter-spacing: var(--tracking-wider); text-transform: uppercase; }
.fact-block dd { margin-top: var(--space-075); color: var(--colour-pale); line-height: var(--leading-body); }
.process-rail { position: relative; margin-top: var(--space-400); }
.process-rail::before { content: ""; position: absolute; top: var(--size-marker); bottom: var(--size-marker); left: calc(var(--size-marker) / 2); width: var(--size-rule); background: var(--colour-steel); }
.process-step { position: relative; display: grid; grid-template-columns: var(--space-600) minmax(0, 5fr) minmax(0, 4fr); gap: var(--space-200); padding-block: var(--space-200); border-top: var(--size-rule) solid var(--colour-steel); }
.process-step:last-child { border-bottom: var(--size-rule) solid var(--colour-steel); }
.process-number { position: relative; z-index: calc(var(--z-base) + 1); display: grid; place-items: center; width: var(--size-marker); height: var(--size-marker); background: var(--colour-black); border: var(--size-rule) solid var(--colour-silver); border-radius: var(--radius-disc); color: var(--colour-silver); font-family: var(--font-utility); font-size: var(--type-micro); }
.process-step h3 { font-family: var(--font-display); font-size: var(--type-subsection); font-weight: var(--weight-medium); letter-spacing: var(--tracking-tight); line-height: var(--leading-snug); }
.process-step p { color: var(--colour-muted); }
.process-proof { align-self: end; color: var(--colour-silver); font-family: var(--font-utility); font-size: var(--type-label); letter-spacing: var(--tracking-wide); text-transform: uppercase; }
.cutaway { position: relative; min-height: 34rem; border: var(--size-rule) solid var(--colour-steel); background: var(--colour-ink); clip-path: polygon(0 0, 91% 0, 100% 11%, 100% 100%, 0 100%); }
.cutaway-spine { position: absolute; top: var(--space-250); bottom: var(--space-250); left: 38%; width: var(--size-rule-strong); background: var(--colour-silver); }
.cutaway-zone { position: absolute; display: grid; gap: var(--space-050); padding: var(--space-125); border: var(--size-rule) solid var(--colour-steel); }
.cutaway-zone strong { font-family: var(--font-display); font-size: var(--type-lead); font-weight: var(--weight-medium); line-height: var(--leading-snug); }
.cutaway-zone span { color: var(--colour-muted); font-size: var(--type-small); line-height: var(--leading-label); }
.cutaway-zone.source { top: var(--space-300); left: var(--space-250); right: 66%; }
.cutaway-zone.model { top: 34%; left: 47%; right: var(--space-300); }
.cutaway-zone.review { bottom: var(--space-300); left: var(--space-250); right: 53%; background: var(--colour-pale); color: var(--colour-black); }
.cutaway-zone.review span { color: var(--colour-steel); }
.cutaway-path { position: absolute; height: var(--size-rule); background: var(--colour-muted); transform-origin: left center; }
.cutaway-path.one { top: 27%; left: 34%; width: 23%; transform: rotate(22deg); }
.cutaway-path.two { top: 58%; left: 38%; width: 33%; transform: rotate(128deg); }
.cutaway-note { position: absolute; right: var(--space-300); bottom: var(--space-250); color: var(--colour-muted); font-family: var(--font-utility); font-size: var(--type-micro); letter-spacing: var(--tracking-wide); text-transform: uppercase; }
.register { border-top: var(--size-rule) solid var(--colour-steel); }
.register-row { display: grid; grid-template-columns: minmax(10rem, 2fr) minmax(0, 4fr) minmax(0, 4fr) minmax(9rem, 2fr); align-items: start; gap: var(--space-150); padding-block: var(--space-150); border-bottom: var(--size-rule) solid var(--colour-steel); }
.register-row > * + * { padding-left: var(--space-150); border-left: var(--size-rule) solid var(--colour-steel); }
.register-code { color: var(--colour-muted); font-family: var(--font-utility); font-size: var(--type-micro); letter-spacing: var(--tracking-wider); text-transform: uppercase; }
.register-title { font-family: var(--font-display); font-size: var(--type-lead); font-weight: var(--weight-semibold); line-height: var(--leading-snug); }
.register-copy { color: var(--colour-muted); }
.status { color: var(--colour-silver); font-family: var(--font-utility); font-size: var(--type-label); letter-spacing: var(--tracking-wide); text-transform: uppercase; }
.status::before { content: ""; display: inline-block; width: var(--space-050); height: var(--space-050); margin-right: var(--space-050); border: var(--size-rule) solid currentColor; border-radius: var(--radius-disc); }
.authority-stack { display: grid; gap: var(--size-rule); background: var(--colour-steel); border: var(--size-rule) solid var(--colour-steel); }
.authority-level { display: grid; grid-template-columns: var(--space-600) minmax(0, 4fr) minmax(0, 6fr); align-items: stretch; background: var(--colour-ink); }
.authority-level:nth-child(2) { margin-left: var(--space-100); }
.authority-level:nth-child(3) { margin-left: var(--space-200); }
.authority-level:nth-child(4) { margin-left: var(--space-300); background: var(--colour-pale); color: var(--colour-black); }
.authority-code, .authority-title, .authority-copy { padding: var(--space-150); }
.authority-title, .authority-copy { border-left: var(--size-rule) solid var(--colour-steel); }
.authority-code { font-family: var(--font-utility); font-size: var(--type-label); letter-spacing: var(--tracking-wide); }
.authority-title { font-family: var(--font-display); font-size: var(--type-lead); font-weight: var(--weight-semibold); line-height: var(--leading-snug); }
.authority-copy { color: var(--colour-muted); }
.authority-level:nth-child(4) .authority-copy { color: var(--colour-steel); }
.page-hero { padding-block: clamp(6rem, 12vw, 12rem) var(--space-600); border-bottom: var(--size-rule) solid var(--colour-charcoal); }
.page-hero-grid { align-items: end; }
.page-intro { display: grid; gap: var(--space-200); }
.page-aside { align-self: end; padding: var(--space-150) 0 0 var(--space-150); border-left: var(--size-rule) solid var(--colour-steel); }
.page-aside dl { display: grid; gap: var(--space-100); }
.page-aside dt { color: var(--colour-muted); font-family: var(--font-utility); font-size: var(--type-micro); letter-spacing: var(--tracking-wider); text-transform: uppercase; }
.page-aside dd { color: var(--colour-silver); line-height: var(--leading-label); }
.principle-list { list-style: none; border-top: var(--size-rule) solid var(--colour-steel); }
.principle-item { display: grid; grid-template-columns: var(--space-500) minmax(0, 4fr) minmax(0, 6fr); gap: var(--space-150); padding-block: var(--space-150); border-bottom: var(--size-rule) solid var(--colour-steel); }
.principle-number { color: var(--colour-muted); font-family: var(--font-utility); font-size: var(--type-label); letter-spacing: var(--tracking-wide); }
.principle-item h3 { font-family: var(--font-display); font-size: var(--type-lead); font-weight: var(--weight-semibold); line-height: var(--leading-snug); }
.principle-item p { color: var(--colour-muted); }
.quote-field { padding: var(--space-500) 0; border-block: var(--size-rule) solid var(--colour-steel); }
.quote-field blockquote { max-width: var(--measure-wide); font-family: var(--font-display); font-size: var(--type-section); font-weight: var(--weight-medium); letter-spacing: var(--tracking-tight); line-height: var(--leading-snug); }
.quote-field cite { display: block; margin-top: var(--space-150); color: var(--colour-muted); font-family: var(--font-utility); font-size: var(--type-label); font-style: normal; letter-spacing: var(--tracking-wide); text-transform: uppercase; }
.paper-feature { display: grid; grid-template-columns: minmax(0, 7fr) minmax(19rem, 5fr); min-height: 34rem; border: var(--size-rule) solid var(--colour-steel); }
.paper-cover { display: flex; flex-direction: column; justify-content: space-between; gap: var(--space-400); padding: var(--space-300); background: var(--colour-pale); color: var(--colour-black); }
.paper-cover .utility-label { color: var(--colour-mid); }
.paper-cover h3 { max-width: var(--measure-copy); font-family: var(--font-display); font-size: var(--type-section); font-weight: var(--weight-semibold); letter-spacing: var(--tracking-tight); line-height: var(--leading-tight); }
.paper-cover-meta { display: flex; justify-content: space-between; gap: var(--space-100); color: var(--colour-steel); font-family: var(--font-utility); font-size: var(--type-micro); letter-spacing: var(--tracking-wide); text-transform: uppercase; }
.paper-notes { display: grid; align-content: space-between; gap: var(--space-250); padding: var(--space-300); }
.paper-notes dl { display: grid; gap: var(--space-150); }
.paper-notes dt { color: var(--colour-muted); font-family: var(--font-utility); font-size: var(--type-micro); letter-spacing: var(--tracking-wider); text-transform: uppercase; }
.paper-notes dd { margin-top: var(--space-050); color: var(--colour-silver); }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-200); }
.field { display: grid; gap: var(--space-050); }
.field-full { grid-column: 1 / -1; }
.field label { color: var(--colour-silver); font-family: var(--font-utility); font-size: var(--type-label); letter-spacing: var(--tracking-wide); text-transform: uppercase; }
.field input, .field textarea, .field select { width: 100%; min-height: var(--size-touch); padding: var(--space-075) var(--space-100); border: var(--size-rule) solid var(--colour-steel); border-radius: var(--radius-sharp); background: var(--colour-ink); color: var(--colour-white); transition-property: border-color, background-color; transition-duration: var(--motion-fast); transition-timing-function: var(--ease-standard); }
.field textarea { min-height: 10rem; resize: vertical; }
.field input:hover, .field textarea:hover, .field select:hover { border-color: var(--colour-muted); }
.field input:active, .field textarea:active, .field select:active { background: var(--colour-graphite); }
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--colour-white); }
.field-help { color: var(--colour-muted); font-size: var(--type-small); }
.form-actions { display: flex; align-items: center; gap: var(--space-150); margin-top: var(--space-200); flex-wrap: wrap; }
.submit-button { min-height: var(--size-touch); padding: var(--space-100) var(--space-150); border: 0; background: var(--colour-pale); color: var(--colour-black); clip-path: polygon(0 0, 91% 0, 100% 27%, 100% 100%, 0 100%); cursor: pointer; font-family: var(--font-utility); font-size: var(--type-small); letter-spacing: var(--tracking-wide); text-transform: uppercase; transition-property: background-color, transform; transition-duration: var(--motion-fast); transition-timing-function: var(--ease-standard); }
.submit-button:hover { background: var(--colour-white); }
.submit-button:active { transform: translateY(var(--size-rule-strong)); }
.form-status { color: var(--colour-silver); font-size: var(--type-small); }
.site-footer { background: var(--colour-ink); }
.footer-main { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); min-height: 24rem; border-bottom: var(--size-rule) solid var(--colour-charcoal); }
.footer-statement { display: flex; flex-direction: column; justify-content: space-between; gap: var(--space-300); padding: var(--space-400) var(--space-400) var(--space-300) 0; border-right: var(--size-rule) solid var(--colour-charcoal); }
.footer-statement strong { max-width: var(--measure-copy); font-family: var(--font-display); font-size: var(--type-section); font-weight: var(--weight-medium); letter-spacing: var(--tracking-tight); line-height: var(--leading-tight); }
.footer-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-content: start; }
.footer-nav-group { padding: var(--space-300); border-bottom: var(--size-rule) solid var(--colour-charcoal); }
.footer-nav-group:nth-child(odd) { border-right: var(--size-rule) solid var(--colour-charcoal); }
.footer-nav-group h2 { color: var(--colour-muted); font-family: var(--font-utility); font-size: var(--type-micro); font-weight: var(--weight-regular); letter-spacing: var(--tracking-wider); text-transform: uppercase; }
.footer-nav-group ul { display: grid; gap: var(--space-050); margin-top: var(--space-100); list-style: none; }
.footer-nav-group a { color: var(--colour-silver); text-decoration-color: var(--colour-mid); text-underline-offset: var(--space-025); }
.footer-nav-group a:hover { color: var(--colour-white); }
.footer-nav-group a:active { color: var(--colour-muted); }
.footer-legal { display: flex; justify-content: space-between; gap: var(--space-150); padding-block: var(--space-125); color: var(--colour-muted); font-family: var(--font-utility); font-size: var(--type-micro); letter-spacing: var(--tracking-wide); text-transform: uppercase; }
.footer-legal-links { display: flex; gap: var(--space-125); }
.footer-legal a { text-decoration: none; }
.footer-legal a:hover { color: var(--colour-white); }
.footer-legal a:active { color: var(--colour-silver); }
.not-found { min-height: calc(100svh - var(--size-header)); display: grid; place-items: center; padding-block: var(--space-section); }
.not-found-code { color: var(--colour-steel); font-family: var(--font-display); font-size: var(--type-display); font-weight: var(--weight-bold); letter-spacing: var(--tracking-tight); line-height: var(--leading-tight); }
@media (max-width: 1160px) {
  .nav-link { padding-inline: var(--space-075); }
  .hero-inner { grid-template-columns: minmax(0, 3fr) minmax(22rem, 2fr); }
  .display { font-size: var(--type-page); }
  .register-row { grid-template-columns: minmax(9rem, 2fr) minmax(0, 4fr) minmax(0, 4fr); }
  .register-row .status { grid-column: 2 / -1; padding-top: var(--space-075); border-left: var(--size-rule) solid var(--colour-steel); }
}
@media (max-width: 920px) {
  body::before { display: none; }
  .menu-toggle { display: block; }
  .primary-nav { position: relative; }
  .nav-list { position: fixed; top: var(--size-header); right: 0; z-index: var(--z-menu); display: none; width: min(100%, var(--size-menu)); background: var(--colour-black); border: var(--size-rule) solid var(--colour-charcoal); border-top: 0; }
  .nav-list[data-open="true"] { display: grid; }
  .nav-link { justify-items: start; padding: var(--space-100) var(--space-125); border-left: 0; border-bottom: var(--size-rule) solid var(--colour-charcoal); }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-copy { padding-right: 0; }
  .aperture { min-height: 29rem; border-top: var(--size-rule) solid var(--colour-charcoal); }
  .statement-band, .footer-main, .paper-feature { grid-template-columns: 1fr; }
  .statement-index, .footer-statement { border-right: 0; border-bottom: var(--size-rule) solid var(--colour-charcoal); }
  .statement-copy { padding-left: 0; }
  .grid-12 { grid-template-columns: repeat(8, minmax(0, 1fr)); }
  .span-4 { grid-column: span 4; }
  .span-5, .span-6, .span-7, .span-8 { grid-column: span 8; }
  .span-6.start-7, .span-7.start-6 { grid-column: span 8; }
  .tab-panel { grid-template-columns: 1fr; }
  .tab-panel-title { border-right: 0; border-bottom: var(--size-rule) solid var(--colour-steel); }
  .process-step { grid-template-columns: var(--space-500) minmax(0, 1fr); }
  .process-proof { grid-column: 2; }
  .footer-statement { padding-right: 0; }
  .page-aside { margin-top: var(--space-100); }
  .paper-cover { min-height: 27rem; }
}
@media (max-width: 680px) {
  .brand-index { display: none; }
  .grid-12 { grid-template-columns: 1fr; }
  .span-4, .span-5, .span-6, .span-7, .span-8, .span-12, .span-6.start-7, .span-7.start-6 { grid-column: 1; }
  .hero-copy { gap: var(--space-400); padding-top: var(--space-500); }
  .hero-meta { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: var(--space-125); }
  .hero-meta-item:nth-child(3) { border-left: 0; padding-left: 0; }
  .tab-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tab-button:nth-child(2) { border-right: 0; }
  .tab-button:nth-child(-n+2) { border-bottom: var(--size-rule) solid var(--colour-steel); }
  .tab-panel-body, .footer-nav, .form-grid { grid-template-columns: 1fr; }
  .fact-block:nth-child(odd), .footer-nav-group:nth-child(odd) { border-right: 0; }
  .field-full { grid-column: 1; }
  .process-step { grid-template-columns: var(--space-400) minmax(0, 1fr); gap: var(--space-100); }
  .register-row, .principle-item, .authority-level { grid-template-columns: 1fr; gap: 0; }
  .register-row > * + *, .principle-item > * + *, .authority-title, .authority-copy { padding-left: 0; border-left: 0; }
  .register-row > *, .principle-item > * { padding-block: var(--space-050); }
  .register-row .status { grid-column: auto; padding-left: 0; border-left: 0; }
  .authority-level:nth-child(2), .authority-level:nth-child(3), .authority-level:nth-child(4) { margin-left: 0; }
  .authority-title, .authority-copy { border-top: var(--size-rule) solid var(--colour-steel); }
  .aperture-layer { grid-template-columns: var(--space-400) minmax(0, 1fr); padding-right: var(--space-300); }
  .aperture-layer:nth-child(2) { margin-left: var(--space-050); }
  .aperture-layer:nth-child(3) { margin-left: var(--space-100); }
  .aperture-layer:nth-child(4) { margin-left: var(--space-150); }
  .cutaway { min-height: 29rem; }
  .cutaway-zone.source { right: 48%; }
  .cutaway-zone.model { left: 43%; right: var(--space-100); }
  .cutaway-zone.review { right: 38%; }
  .footer-legal { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: var(--motion-fast) !important; animation-iteration-count: 1 !important; transition-duration: var(--motion-fast) !important; }
  .aperture-scan { display: none; }
}

/* Model foundry visual system, v1.1.0 */
.lab-hero {
  background:
    linear-gradient(90deg, transparent 49.9%, var(--colour-charcoal) 50%, transparent 50.1%),
    var(--colour-black);
}
.lab-hero .hero-inner {
  grid-template-columns: minmax(0, 0.88fr) minmax(28rem, 1.12fr);
}
.lab-hero .hero-copy {
  position: relative;
  z-index: calc(var(--z-base) + 3);
}
.lab-hero .display {
  max-width: 9.5ch;
}
.model-specimen {
  position: relative;
  min-height: var(--size-specimen);
  margin: 0;
  overflow: hidden;
  border-inline: var(--size-rule) solid var(--colour-charcoal);
  background: var(--colour-ink);
  isolation: isolate;
}
.model-specimen::before,
.model-specimen::after {
  position: absolute;
  z-index: calc(var(--z-base) + 1);
  content: "";
  pointer-events: none;
}
.model-specimen::before {
  inset: var(--space-150);
  border: var(--size-rule) solid var(--colour-steel);
  clip-path: polygon(0 0, 82% 0, 100% 15%, 100% 100%, 14% 100%, 0 84%);
}
.model-specimen::after {
  inset: 0;
  background: repeating-linear-gradient(0deg, transparent 0, transparent calc(var(--space-400) - var(--size-rule)), var(--colour-charcoal) var(--space-400));
  opacity: 0.36;
}
.model-specimen-canvas {
  position: absolute;
  inset: 0;
  z-index: var(--z-base);
  width: 100%;
  height: 100%;
}
.specimen-fallback {
  position: absolute;
  inset: 11% 8% 18%;
  z-index: calc(var(--z-base) + 1);
  perspective: 68rem;
  transform-style: preserve-3d;
  animation: specimen-orbit var(--motion-orbit) var(--ease-standard) infinite;
  transition-property: opacity;
  transition-duration: var(--motion-base);
  transition-timing-function: var(--ease-standard);
}
.webgl-ready .specimen-fallback { opacity: 0; }
.specimen-plate,
.specimen-filament {
  position: absolute;
  left: 50%;
  top: 50%;
  display: block;
  transform-style: preserve-3d;
}
.specimen-plate {
  width: 68%;
  height: 10%;
  border: var(--size-rule) solid var(--colour-muted);
  background: var(--colour-charcoal);
  box-shadow: inset 0 0 0 var(--size-rule) var(--colour-black);
}
.specimen-plate::before,
.specimen-plate::after {
  position: absolute;
  content: "";
  background: var(--colour-steel);
}
.specimen-plate::before {
  inset: 18% 9%;
  border: var(--size-rule) solid var(--colour-mid);
  background: transparent;
}
.specimen-plate::after {
  top: 50%;
  left: 14%;
  width: 72%;
  height: var(--size-rule);
}
.specimen-plate-one { transform: translate(-52%, -238%) rotateX(64deg) rotateZ(-8deg); }
.specimen-plate-two { transform: translate(-48%, -128%) rotateX(64deg) rotateZ(4deg); }
.specimen-plate-three { transform: translate(-54%, -18%) rotateX(64deg) rotateZ(-3deg); background: var(--colour-steel); }
.specimen-plate-four { transform: translate(-46%, 92%) rotateX(64deg) rotateZ(7deg); }
.specimen-plate-five { transform: translate(-50%, 202%) rotateX(64deg) rotateZ(-5deg); background: var(--colour-pale); }
.specimen-filament {
  width: var(--size-rule-strong);
  height: 74%;
  background: var(--colour-bronze);
  transform: translate(-50%, -50%) rotateX(64deg) translateZ(var(--space-500));
  animation: specimen-filament var(--motion-film) var(--ease-standard) infinite;
}
.specimen-readout {
  position: absolute;
  z-index: calc(var(--z-base) + 4);
  top: var(--space-250);
  left: var(--space-250);
  max-width: var(--measure-narrow);
}
.specimen-readout > span,
.model-specimen figcaption,
.route-instrument figcaption,
.specimen-legend {
  font-family: var(--font-utility);
  font-size: var(--type-micro);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}
.specimen-readout > span { color: var(--colour-bronze-pale); }
.specimen-readout strong {
  display: block;
  margin-top: var(--space-050);
  font-family: var(--font-display);
  font-size: var(--type-lead);
  font-weight: var(--weight-medium);
}
.specimen-readout p {
  max-width: 24rem;
  margin-top: var(--space-050);
  color: var(--colour-muted);
  font-size: var(--type-small);
  line-height: var(--leading-label);
}
.specimen-legend {
  position: absolute;
  z-index: calc(var(--z-base) + 4);
  right: var(--space-250);
  top: 50%;
  display: grid;
  gap: var(--space-100);
  color: var(--colour-silver);
  list-style: none;
  transform: translateY(-50%);
}
.specimen-legend li {
  display: grid;
  grid-template-columns: var(--space-150) auto;
  align-items: center;
  gap: var(--space-075);
}
.specimen-legend li::before {
  content: "";
  width: 100%;
  height: var(--size-rule);
  background: var(--colour-mid);
}
.model-specimen figcaption {
  position: absolute;
  z-index: calc(var(--z-base) + 4);
  right: var(--space-250);
  bottom: var(--space-200);
  left: var(--space-250);
  color: var(--colour-muted);
}
.lab-cinema {
  padding-block: var(--space-section);
  color: var(--colour-pale);
  background: var(--colour-ink);
  border-bottom: var(--size-rule) solid var(--colour-charcoal);
}
.lab-cinema-grid {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(34rem, 8fr);
  gap: clamp(3rem, 8vw, 9rem);
  align-items: center;
}
.lab-cinema header {
  display: grid;
  gap: var(--space-200);
}
.lab-cinema header .eyebrow { color: var(--colour-bronze-pale); }
.cinema-stage {
  position: relative;
  min-height: 36rem;
  overflow: hidden;
  border-block: var(--size-rule) solid var(--colour-steel);
  perspective: 72rem;
  isolation: isolate;
}
.cinema-stage::before {
  position: absolute;
  inset: 0;
  content: "";
  background: repeating-linear-gradient(90deg, transparent 0, transparent calc(var(--space-500) - var(--size-rule)), var(--colour-charcoal) var(--space-500));
  opacity: 0.5;
}
.cinema-spine {
  position: absolute;
  z-index: calc(var(--z-base) + 1);
  top: 8%;
  bottom: 8%;
  left: 50%;
  width: var(--size-rule-strong);
  background: var(--colour-bronze-dark);
}
.cinema-frame {
  position: absolute;
  z-index: calc(var(--z-base) + 2);
  width: 44%;
  min-height: 20%;
  padding: var(--space-125);
  display: grid;
  grid-template-columns: var(--space-250) 1fr;
  align-content: center;
  gap: var(--space-050) var(--space-100);
  border: var(--size-rule) solid var(--colour-steel);
  background: var(--colour-graphite);
  transform-style: preserve-3d;
  animation: cinema-breathe var(--motion-film) var(--ease-standard) infinite;
}
.cinema-frame > span {
  grid-row: span 2;
  color: var(--colour-bronze-pale);
  font-family: var(--font-utility);
  font-size: var(--type-label);
}
.cinema-frame strong {
  font-family: var(--font-display);
  font-size: var(--type-lead);
  font-weight: var(--weight-medium);
}
.cinema-frame small { color: var(--colour-muted); }
.cinema-source { top: 6%; left: 2%; animation-delay: calc(var(--motion-film) / -5); }
.cinema-model { top: 23%; right: 2%; animation-delay: calc(var(--motion-film) / -4); }
.cinema-evaluate { top: 40%; left: 4%; animation-delay: calc(var(--motion-film) / -3); }
.cinema-tools { top: 57%; right: 4%; animation-delay: calc(var(--motion-film) / -2); }
.cinema-operate { top: 74%; left: 2%; background: var(--colour-pale); color: var(--colour-black); }
.cinema-operate small { color: var(--colour-steel); }
.cinema-signal {
  position: absolute;
  z-index: calc(var(--z-base) + 4);
  top: 7%;
  left: calc(50% - var(--space-025));
  width: var(--space-050);
  height: var(--space-300);
  background: var(--colour-bronze);
  animation: cinema-signal var(--motion-film) var(--ease-standard) infinite;
}
.page-hero-instrumented .page-hero-grid {
  align-items: stretch;
}
.page-hero-visual {
  display: grid;
  grid-template-rows: minmax(20rem, 1fr) auto;
  border-left: var(--size-rule) solid var(--colour-charcoal);
}
.route-instrument {
  position: relative;
  min-height: var(--size-instrument);
  margin: 0;
  padding: var(--space-125);
  overflow: hidden;
  background: var(--colour-ink);
}
.route-instrument svg {
  width: 100%;
  height: 100%;
  color: var(--colour-mid);
}
.instrument-line,
.instrument-gate,
.instrument-sample {
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}
.instrument-line-primary {
  color: var(--colour-silver);
  stroke-dasharray: 160 36;
  animation: instrument-draw var(--motion-film) linear infinite;
}
.instrument-solid { fill: var(--colour-bronze); stroke: var(--colour-bronze-pale); stroke-width: 2; }
.instrument-gate { color: var(--colour-bronze-dark); stroke-dasharray: 8 12; }
.instrument-signal { fill: var(--colour-pale); animation: instrument-signal var(--motion-film) var(--ease-standard) infinite; }
.instrument-sample { fill: var(--colour-charcoal); }
.route-instrument figcaption {
  position: absolute;
  right: var(--space-125);
  bottom: var(--space-100);
  left: var(--space-125);
  display: flex;
  justify-content: space-between;
  gap: var(--space-100);
  color: var(--colour-muted);
}
.page-hero-visual .page-aside {
  grid-column: auto;
  margin: 0;
  border-top: var(--size-rule) solid var(--colour-charcoal);
}
@keyframes specimen-orbit {
  0%, 100% { transform: rotateX(-3deg) rotateY(-7deg); }
  45%, 60% { transform: rotateX(4deg) rotateY(8deg); }
}
@keyframes specimen-filament {
  0%, 12% { opacity: 0.2; transform: translate(-50%, -58%) rotateX(64deg) translateZ(var(--space-500)); }
  42%, 64% { opacity: 1; transform: translate(-50%, -50%) rotateX(64deg) translateZ(var(--space-500)); }
  88%, 100% { opacity: 0.2; transform: translate(-50%, -42%) rotateX(64deg) translateZ(var(--space-500)); }
}
@keyframes cinema-breathe {
  0%, 100% { transform: translateZ(0) rotateY(0); }
  45%, 60% { transform: translateZ(var(--space-150)) rotateY(-2deg); }
}
@keyframes cinema-signal {
  0%, 8% { transform: translateY(0); opacity: 0; }
  16% { opacity: 1; }
  82% { opacity: 1; }
  92%, 100% { transform: translateY(26rem); opacity: 0; }
}
@keyframes instrument-draw {
  from { stroke-dashoffset: 0; }
  to { stroke-dashoffset: -196; }
}
@keyframes instrument-signal {
  0%, 15% { transform: translateX(0); opacity: 0; }
  22% { opacity: 1; }
  75% { opacity: 1; }
  90%, 100% { transform: translateX(29rem); opacity: 0; }
}
@media (max-width: 920px) {
  .lab-hero { background: var(--colour-black); }
  .lab-hero .hero-inner { grid-template-columns: 1fr; }
  .model-specimen { min-height: 34rem; border-top: var(--size-rule) solid var(--colour-charcoal); }
  .lab-cinema-grid { grid-template-columns: 1fr; }
  .page-hero-visual { grid-column: span 8; border-left: 0; border-top: var(--size-rule) solid var(--colour-charcoal); }
}
@media (max-width: 680px) {
  .model-specimen { min-height: 31rem; }
  .specimen-readout { top: var(--space-150); left: var(--space-150); }
  .specimen-readout p { max-width: 18rem; }
  .specimen-legend { display: none; }
  .model-specimen figcaption { right: var(--space-150); bottom: var(--space-125); left: var(--space-150); }
  .lab-cinema-grid { gap: var(--space-400); }
  .cinema-stage { min-height: 32rem; }
  .cinema-frame { width: 66%; }
  .cinema-source, .cinema-evaluate, .cinema-operate { left: 0; }
  .cinema-model, .cinema-tools { right: 0; }
  .page-hero-visual { grid-column: 1; }
  .route-instrument { min-height: 22rem; }
  .route-instrument figcaption span:last-child { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .specimen-fallback,
  .specimen-filament,
  .cinema-frame,
  .cinema-signal,
  .instrument-line-primary,
  .instrument-signal { animation: none !important; }
}

/* Model Foundry motion study */
.film-hero {
  min-height: 100svh;
  padding: clamp(7rem, 12vh, 10rem) 0 var(--space-500);
  display: grid;
  align-items: center;
  color: var(--colour-pale);
  background: var(--colour-black);
  overflow: hidden;
}
.film-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(34rem, 1.22fr);
  gap: clamp(2rem, 7vw, 8rem);
  align-items: center;
}
.film-copy {
  position: relative;
  z-index: calc(var(--z-base) + 5);
}
.film-title {
  max-width: 9ch;
  margin: var(--space-150) 0 var(--space-200);
  font-family: var(--font-display);
  font-size: clamp(4rem, 8vw, 9rem);
  font-weight: var(--weight-medium);
  letter-spacing: -0.055em;
  line-height: 0.86;
}
.film-copy .lead {
  max-width: 38rem;
  color: var(--colour-silver);
}
.film-specimen {
  min-height: clamp(34rem, 68vw, 52rem);
  border: var(--size-rule) solid var(--colour-charcoal);
  background: var(--colour-ink);
  transform: perspective(80rem) rotateY(-4deg) rotateX(1deg);
  transform-origin: center right;
}
.film-sequence {
  padding: clamp(5rem, 9vw, 9rem) 0;
}
.film-steps {
  margin: var(--space-300) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: var(--size-rule) solid var(--colour-charcoal);
  border-bottom: var(--size-rule) solid var(--colour-charcoal);
  list-style: none;
}
.film-steps li {
  min-height: 18rem;
  padding: var(--space-150);
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: var(--space-100);
  border-right: var(--size-rule) solid var(--colour-charcoal);
}
.film-steps li:last-child { border-right: 0; }
.film-steps span {
  color: var(--colour-bronze-pale);
  font-family: var(--font-utility);
  font-size: var(--type-label);
}
.film-steps strong {
  align-self: center;
  font-family: var(--font-display);
  font-size: clamp(2rem, 3vw, 4rem);
  font-weight: var(--weight-medium);
  letter-spacing: -0.035em;
}
.film-steps p {
  margin: 0;
  color: var(--colour-muted);
  line-height: 1.5;
}
.route-instrument-contact .instrument-solid,
.route-instrument-lab .instrument-solid,
.route-instrument-about .instrument-solid,
.route-instrument-privacy .instrument-solid,
.route-instrument-terms .instrument-solid {
  transform-box: fill-box;
  transform-origin: center;
}
.route-instrument-contact .instrument-solid { animation: contact-gate var(--motion-film) var(--ease-standard) infinite; }
.route-instrument-lab .instrument-solid { animation: lab-transfer var(--motion-film) var(--ease-standard) infinite; }
.route-instrument-about .instrument-solid { animation: about-axis var(--motion-film) var(--ease-standard) infinite; }
.route-instrument-privacy .instrument-solid { animation: privacy-shutter var(--motion-film) var(--ease-standard) infinite; }
.route-instrument-terms .instrument-solid { animation: terms-boundary var(--motion-film) var(--ease-standard) infinite; }
@keyframes contact-gate {
  0%, 15%, 100% { transform: scaleX(0.72); }
  42%, 68% { transform: scaleX(1); }
}
@keyframes lab-transfer {
  0%, 12%, 100% { transform: translateX(-4rem); }
  48%, 64% { transform: translateX(0); }
}
@keyframes about-axis {
  0%, 100% { transform: rotate(0deg) scale(0.9); }
  50% { transform: rotate(45deg) scale(1); }
}
@keyframes privacy-shutter {
  0%, 100% { transform: scale(0.72); opacity: 0.55; }
  50% { transform: scale(1); opacity: 1; }
}
@keyframes terms-boundary {
  0%, 100% { transform: scaleX(0.72); }
  50% { transform: scaleX(1); }
}
@media (max-width: 920px) {
  .film-grid { grid-template-columns: 1fr; }
  .film-specimen { min-height: 36rem; transform: none; }
  .film-steps { grid-template-columns: 1fr; }
  .film-steps li { min-height: 12rem; border-right: 0; border-bottom: var(--size-rule) solid var(--colour-charcoal); }
  .film-steps li:last-child { border-bottom: 0; }
}
@media (max-width: 680px) {
  .film-hero { padding-top: 7rem; }
  .film-title { font-size: clamp(3.6rem, 18vw, 5.8rem); }
  .film-specimen { min-height: 31rem; }
}
@media (prefers-reduced-motion: reduce) {
  .route-instrument-contact .instrument-solid,
  .route-instrument-lab .instrument-solid,
  .route-instrument-about .instrument-solid,
  .route-instrument-privacy .instrument-solid,
  .route-instrument-terms .instrument-solid { animation: none !important; }
}