:root {
  color-scheme: light;
  --page-max: 1432px;
  --page-pad: clamp(28px, 3.6vw, 58px);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --yellow: #f4b713;
  --yellow-strong: #ffbf0b;
  --green: #6f8d55;
  --danger: #bb654f;
  --font: "Onest", "Helvetica Neue", Arial, sans-serif;
  font-family: var(--font);
}

html[data-scene="day"] {
  color-scheme: light;
  --ink: #24231f;
  --ink-soft: #4a463f;
  --ink-faint: #514d45;
  --page-bg: #c9bda8;
  --scene-position: left center;
  --scene-opacity: .90;
  --scene-filter: saturate(.92) contrast(.98) brightness(1.01);
  --veil: linear-gradient(180deg, rgba(246, 237, 220, .10), rgba(138, 120, 91, .18));
  --glass: rgba(255, 250, 239, .14);
  --glass-strong: rgba(255, 251, 243, .23);
  --glass-soft: rgba(255, 252, 245, .08);
  --glass-edge: rgba(255, 255, 255, .56);
  --glass-line: rgba(74, 65, 49, .17);
  --glass-glow: rgba(255, 255, 255, .22);
  --shadow: 0 24px 58px rgba(70, 56, 35, .16), 0 3px 12px rgba(57, 45, 28, .08);
  --passport: rgba(39, 37, 31, .79);
  --passport-edge: rgba(255, 240, 207, .22);
  --passport-ink: #fffaf0;
  --passport-soft: rgba(255, 250, 240, .68);
  --footer: rgba(33, 32, 28, .80);
  --photo-shade: linear-gradient(180deg, rgba(20, 18, 14, 0) 46%, rgba(21, 19, 15, .72) 100%);
  --spatial-light: radial-gradient(circle at 76% 22%, rgba(255, 233, 185, .12), transparent 30%);
  --panel-clear: rgba(255, 252, 245, .09);
  --panel-milk: rgba(255, 250, 239, .25);
  --panel-warm: rgba(230, 209, 176, .16);
  --cta-wash: linear-gradient(90deg, rgba(255, 249, 237, .08), rgba(255, 248, 232, .20) 35% 66%, rgba(255, 249, 237, .08));
  --ambient-room:
    radial-gradient(ellipse at 50% 12%, rgba(255, 246, 226, .52), transparent 48%),
    linear-gradient(90deg, #b9ad98 0%, #d4c8b3 28%, #d4c8b3 72%, #b9ad98 100%);
}

html[data-scene="night"] {
  color-scheme: dark;
  --ink: #f2e9d9;
  --ink-soft: #d1c5b2;
  --ink-faint: #b8aa96;
  --page-bg: #17140f;
  --scene-position: right center;
  --scene-opacity: .90;
  --scene-filter: saturate(.94) contrast(1.02) brightness(.92);
  --veil: linear-gradient(180deg, rgba(13, 12, 10, .16), rgba(9, 8, 7, .38));
  --glass: rgba(50, 42, 31, .13);
  --glass-strong: rgba(54, 45, 33, .22);
  --glass-soft: rgba(42, 35, 27, .07);
  --glass-edge: rgba(247, 205, 139, .31);
  --glass-line: rgba(244, 203, 134, .19);
  --glass-glow: rgba(255, 210, 139, .10);
  --shadow: 0 28px 68px rgba(0, 0, 0, .34), 0 3px 14px rgba(0, 0, 0, .22);
  --passport: rgba(18, 17, 14, .67);
  --passport-edge: rgba(245, 190, 96, .26);
  --passport-ink: #fff4df;
  --passport-soft: rgba(255, 240, 215, .66);
  --footer: rgba(17, 16, 13, .74);
  --photo-shade: linear-gradient(180deg, rgba(7, 6, 5, 0) 36%, rgba(7, 6, 5, .82) 100%);
  --spatial-light:
    radial-gradient(circle at 18% 18%, rgba(242, 165, 68, .14), transparent 23%),
    radial-gradient(circle at 78% 42%, rgba(255, 181, 81, .13), transparent 25%),
    radial-gradient(circle at 34% 76%, rgba(234, 145, 47, .10), transparent 20%);
  --panel-clear: rgba(29, 24, 18, .10);
  --panel-milk: rgba(53, 43, 31, .23);
  --panel-warm: rgba(69, 49, 28, .18);
  --cta-wash: linear-gradient(90deg, rgba(18, 14, 10, .12), rgba(35, 25, 15, .32) 35% 66%, rgba(18, 14, 10, .12));
  --ambient-room:
    radial-gradient(ellipse at 50% 18%, rgba(111, 70, 33, .26), transparent 46%),
    linear-gradient(90deg, #0c0a08 0%, #1d1710 28%, #1d1710 72%, #0c0a08 100%);
}

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

html {
  scroll-behavior: smooth;
  background: var(--ambient-room, var(--page-bg));
}

body {
  position: relative;
  margin: 0;
  min-width: 1080px;
  min-height: 100vh;
  overflow-x: clip;
  color: var(--ink);
  background: var(--ambient-room, var(--page-bg));
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  transition: color .28s ease, background-color .28s ease;
}

button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
img { max-width: 100%; }

.skip-link {
  position: fixed;
  z-index: 100;
  left: 18px;
  top: 14px;
  padding: 10px 16px;
  color: #1f1c15;
  background: var(--yellow);
  border-radius: 999px;
  opacity: 0;
  transform: translateY(-180%);
}

.skip-link:focus { opacity: 1; transform: translateY(0); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.room-world {
  position: absolute;
  z-index: 0;
  inset: 0;
  min-height: 100%;
  overflow: hidden;
  pointer-events: none;
  background: var(--ambient-room, var(--page-bg));
}

.room-world__plate {
  position: absolute;
  left: 50%;
  width: min(105%, 1600px);
  height: 1450px;
  background-image: none;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: var(--scene-opacity);
  filter: var(--scene-filter);
  transform: translateX(-50%) scale(1.02);
  transform-origin: center;
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 6%, #000 94%, transparent);
  mask-image: linear-gradient(180deg, transparent, #000 6%, #000 94%, transparent);
  transition: opacity .34s ease, filter .34s ease;
}

.room-world__plate--top { top: -180px; height: 1510px; }
.room-world__plate--middle {
  top: 1280px;
  height: 1540px;
  transform: translateX(-50%) scale(1.04);
}
.room-world__plate--lower {
  top: 2770px;
  height: 2050px;
  transform: translateX(-50%) scale(1.06);
}
.room-world__plate--mobile-four,
.room-world__plate--mobile-five,
.room-world__plate--mobile-six { display: none; }

html[data-scene="day"] .room-world__plate--top { background-image: url("assets/final/scenes/web/scene-01-main-day-4758-960.webp"); }
html[data-scene="night"] .room-world__plate--top { background-image: url("assets/final/scenes/web/scene-01-main-night-4758-960.webp"); }

html[data-scene="day"] .knowledge-story--width .knowledge-story__photo { background-image: url("assets/final/scenes/web/scene-08-rooms-day-4758-3840.webp"); }
html[data-scene="night"] .knowledge-story--width .knowledge-story__photo { background-image: url("assets/final/scenes/web/scene-08-rooms-night-4758-3840.webp"); }
html[data-scene="day"] .calculation-proof__scene,
html[data-scene="day"] .knowledge-story--reserve .knowledge-story__photo { background-image: url("assets/final/scenes/web/scene-28-calculation-day-4608-3840.webp"); }
html[data-scene="night"] .calculation-proof__scene,
html[data-scene="night"] .knowledge-story--reserve .knowledge-story__photo { background-image: url("assets/final/scenes/web/scene-28-calculation-night-4608-3840.webp"); }
html[data-scene="day"] .knowledge-story--measure .knowledge-story__photo { background-image: url("assets/final/scenes/web/scene-32-installation-day-4608-3840.webp"); }
html[data-scene="night"] .knowledge-story--measure .knowledge-story__photo { background-image: url("assets/final/scenes/web/scene-32-installation-night-4608-3840.webp"); }
html[data-scene="day"] .final-cta,
html[data-scene="day"] .pilot-cta,
html[data-scene="night"] .final-cta,
html[data-scene="night"] .pilot-cta { background-image: var(--cta-wash); }

/* Approved premium scene pair for the Decision OS main page.  The day/night
   files are separate baked lighting states, not a CSS recolour. */
html[data-scene="day"] body.v5-main .room-world__plate--top {
  background-image: url("assets/final/scenes/web/scene-01-main-day-4758-960.webp");
}
html[data-scene="night"] body.v5-main .room-world__plate--top {
  background-image: url("assets/final/scenes/web/scene-01-main-night-4758-960.webp");
}

@media (min-width: 768px) {
  html[data-scene="day"] body.v5-main .room-world__plate--top { background-image: url("assets/final/scenes/web/scene-01-main-day-4758-1600.webp"); }
  html[data-scene="night"] body.v5-main .room-world__plate--top { background-image: url("assets/final/scenes/web/scene-01-main-night-4758-1600.webp"); }
}

@media (min-width: 1500px) {
  html[data-scene="day"] body.v5-main .room-world__plate--top { background-image: url("assets/final/scenes/web/scene-01-main-day-4758-2560.webp"); }
  html[data-scene="night"] body.v5-main .room-world__plate--top { background-image: url("assets/final/scenes/web/scene-01-main-night-4758-2560.webp"); }
}

@media (min-width: 2800px) {
  html[data-scene="day"] body.v5-main .room-world__plate--top { background-image: url("assets/final/scenes/web/scene-01-main-day-4758-3840.webp"); }
  html[data-scene="night"] body.v5-main .room-world__plate--top { background-image: url("assets/final/scenes/web/scene-01-main-night-4758-3840.webp"); }
}

/* Final 4K scene-fit contract.  The old 1600px/cover plate was a temporary
   low-resolution safeguard and cropped the approved frame.  Final scenes use
   their native aspect ratio across the viewport, so the whole photograph is
   visible on 3440px screens without stretching or clipping. */
body.v5-main { --approved-scene-ratio: 1586 / 992; }
body.v5-main .room-world__plate--top {
  top: 0;
  left: 0;
  width: 100%;
  height: auto;
  aspect-ratio: var(--approved-scene-ratio);
  opacity: 1;
  filter: none;
  transform: none;
  background-size: cover;
  background-position: center;
  -webkit-mask-image: linear-gradient(180deg, #000 0, #000 88%, transparent 100%);
  mask-image: linear-gradient(180deg, #000 0, #000 88%, transparent 100%);
}
body.v5-main .room-world__plate--middle {
  top: max(1280px, calc(62.547vw - 150px));
}
body.v5-main .room-world__plate--lower {
  top: max(2770px, calc(62.547vw + 1350px));
}

/* The approved photograph is shown only in its native-ratio plate.  Extra
   legacy plates created a second, cropped room at the bottom of long pages. */
body.v5-main .room-world__plate--middle,
body.v5-main .room-world__plate--lower,
body.v5-main .room-world__plate--mobile-four,
body.v5-main .room-world__plate--mobile-five,
body.v5-main .room-world__plate--mobile-six,
body.pilot-page .room-world__plate--middle,
body.pilot-page .room-world__plate--lower,
body.pilot-page .room-world__plate--mobile-four,
body.pilot-page .room-world__plate--mobile-five,
body.pilot-page .room-world__plate--mobile-six {
  display: none;
}

/* Single-photo contract: every route keeps one approved hero scene. The rest
   of the page uses the calm room-derived ambient field and physical glass. */
/* ProjectStop stays in the normal main-room scene until the selector engine
   marks a real institution stop, then swaps only the locked hero image. */
body.pilot-page--navigator.v5-main[data-project-stop="true"] .room-world__plate--top {
  top: 0;
  left: 0;
  width: 100%;
  height: auto;
  aspect-ratio: 1586 / 992;
  background-position: center top;
  background-repeat: no-repeat;
  background-size: 100% 100%;
  -webkit-mask-image: linear-gradient(180deg, #000 0, #000 88%, transparent 100%);
  mask-image: linear-gradient(180deg, #000 0, #000 88%, transparent 100%);
}

html[data-scene="day"] body.pilot-page--navigator.v5-main[data-project-stop="true"] .room-world__plate--top {
  background-image: url("assets/final/scenes/web/scene-14-institutions-day-4758-960.webp");
}

html[data-scene="night"] body.pilot-page--navigator.v5-main[data-project-stop="true"] .room-world__plate--top {
  background-image: url("assets/final/scenes/web/scene-14-institutions-night-4758-960.webp");
}

@media (min-width: 768px) {
  html[data-scene="day"] body.pilot-page--navigator.v5-main[data-project-stop="true"] .room-world__plate--top { background-image: url("assets/final/scenes/web/scene-14-institutions-day-4758-1600.webp"); }
  html[data-scene="night"] body.pilot-page--navigator.v5-main[data-project-stop="true"] .room-world__plate--top { background-image: url("assets/final/scenes/web/scene-14-institutions-night-4758-1600.webp"); }
}

@media (min-width: 1500px) {
  html[data-scene="day"] body.pilot-page--navigator.v5-main[data-project-stop="true"] .room-world__plate--top { background-image: url("assets/final/scenes/web/scene-14-institutions-day-4758-2560.webp"); }
  html[data-scene="night"] body.pilot-page--navigator.v5-main[data-project-stop="true"] .room-world__plate--top { background-image: url("assets/final/scenes/web/scene-14-institutions-night-4758-2560.webp"); }
}

@media (min-width: 2800px) {
  html[data-scene="day"] body.pilot-page--navigator.v5-main[data-project-stop="true"] .room-world__plate--top { background-image: url("assets/final/scenes/web/scene-14-institutions-day-4758-3840.webp"); }
  html[data-scene="night"] body.pilot-page--navigator.v5-main[data-project-stop="true"] .room-world__plate--top { background-image: url("assets/final/scenes/web/scene-14-institutions-night-4758-3840.webp"); }
}

.room-world__light {
  position: absolute;
  inset: 0;
  background: var(--spatial-light), var(--veil);
  transition: background .3s ease;
}

.room-world__grain {
  position: absolute;
  inset: 0;
  opacity: .08;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.7' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}

@media (min-width: 1700px) {
  .room-world__plate {
    -webkit-mask-image:
      linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent),
      linear-gradient(180deg, transparent, #000 6%, #000 94%, transparent);
    -webkit-mask-composite: source-in;
    mask-image:
      linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent),
      linear-gradient(180deg, transparent, #000 6%, #000 94%, transparent);
    mask-composite: intersect;
  }
}

.site-header, main, .site-footer { position: relative; z-index: 1; }

.site-header {
  width: min(calc(100% - (var(--page-pad) * 2)), var(--page-max));
  height: 88px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
}

.brand {
  --brand-accent: #c88e13;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  width: fit-content;
  color: inherit;
  text-decoration: none;
  white-space: nowrap;
}

.brand__mark {
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  overflow: visible;
}

.brand__mark-ribbon {
  fill: none;
  stroke: currentColor;
  stroke-width: 5.2;
  stroke-linecap: square;
  stroke-linejoin: round;
}

.brand__mark-roll { fill: var(--brand-accent); }
.brand__wordmark {
  display: inline-flex;
  align-items: baseline;
  font-size: 19px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.025em;
}
.brand__domain { display: inline-flex; align-items: baseline; }
.brand__domain i { color: var(--brand-accent); font-style: normal; font-weight: 760; }
.brand__domain b { font-weight: 760; }
html[data-scene="night"] .brand { --brand-accent: #e8b54f; }

.glass {
  position: relative;
  background:
    linear-gradient(135deg, var(--glass-glow), rgba(255, 255, 255, 0) 27%),
    linear-gradient(152deg, var(--glass-strong), var(--glass) 54%, var(--glass-soft));
  border: 1px solid var(--glass-edge);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, .20), inset 0 -1px 0 rgba(30, 24, 17, .08);
  -webkit-backdrop-filter: blur(22px) saturate(1.04);
  backdrop-filter: blur(22px) saturate(1.04);
}

.glass--compact {
  border-radius: 999px;
  -webkit-backdrop-filter: blur(16px) saturate(1.08);
  backdrop-filter: blur(16px) saturate(1.08);
  box-shadow: 0 12px 28px rgba(32, 24, 14, .12), inset 0 1px 0 rgba(255,255,255,.2);
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px;
}

.top-nav a {
  padding: 9px 16px;
  border-radius: 999px;
  text-decoration: none;
  font-size: 13px;
  color: var(--ink-soft);
  transition: background .2s ease, color .2s ease;
}

.top-nav a:hover { background: var(--glass-strong); color: var(--ink); }

.header-actions {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 12px;
}

.dos-passport-chip {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 0 13px;
  color: var(--ink-soft);
  font-size: 10px;
  font-weight: 650;
  text-decoration: none;
  white-space: nowrap;
}

.dos-passport-chip[data-passport-state="saved"] {
  color: var(--ink);
  box-shadow: inset 3px 0 0 color-mix(in srgb, var(--green) 68%, transparent), 0 12px 28px rgba(32,24,14,.1);
}

.scene-switch { display: flex; padding: 4px; }
.scene-switch button {
  border: 0;
  padding: 8px 11px;
  border-radius: 999px;
  color: var(--ink-soft);
  background: transparent;
  cursor: pointer;
  font-size: 12px;
}

.scene-switch button[aria-pressed="true"] {
  color: var(--ink);
  background: var(--glass-strong);
  box-shadow: inset 0 0 0 1px var(--glass-line);
}

.catalog-button, .primary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: #211b0d;
  background: linear-gradient(180deg, #ffc52b, var(--yellow));
  border: 1px solid rgba(107, 76, 7, .16);
  box-shadow: 0 10px 22px rgba(148, 99, 0, .19), inset 0 1px 0 rgba(255,255,255,.46);
  text-decoration: none;
  font-weight: 650;
  transition: transform .18s ease, box-shadow .18s ease;
}

.catalog-button { min-height: 42px; padding: 0 17px; border-radius: 10px; font-size: 13px; }
.catalog-button:hover, .primary-action:hover { transform: translateY(-1px); box-shadow: 0 13px 28px rgba(148, 99, 0, .24); }

.eyebrow {
  margin: 0 0 12px;
  color: var(--ink-soft);
  font-size: 11px;
  font-weight: 680;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.hero {
  width: min(calc(100% - (var(--page-pad) * 2)), var(--page-max));
  margin: 0 auto;
  padding: 48px 0 74px;
}

.hero__intro { width: 520px; margin: 0 0 30px 18px; }
.hero__intro h1 {
  margin: 0;
  max-width: 570px;
  font-size: clamp(56px, 4.7vw, 76px);
  font-weight: 500;
  line-height: .98;
  letter-spacing: -.058em;
}

.hero__intro > p:last-child {
  width: 330px;
  margin: 18px 0 0;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.45;
}

.selector {
  border-radius: var(--radius-xl);
  overflow: hidden;
  background:
    linear-gradient(135deg, var(--glass-glow), transparent 24%),
    linear-gradient(150deg, var(--panel-milk), var(--glass-soft));
}

.selector__topbar {
  position: relative;
  z-index: 4;
  min-height: 60px;
  display: grid;
  grid-template-columns: minmax(170px, 1fr) minmax(230px, 280px) auto;
  align-items: center;
  gap: 18px;
  padding: 9px 16px 9px 24px;
  border-bottom: 1px solid var(--glass-line);
}

.selector__summary { display: grid; gap: 3px; }
.selector__summary span { color: var(--ink-faint); font-size: 10px; font-weight: 650; letter-spacing: .14em; text-transform: uppercase; }
.selector__summary strong { font-size: 16px; font-weight: 560; }

.selector-example { position: relative; min-width: 0; }
.selector-example summary {
  min-height: 48px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 12px;
  align-items: center;
  gap: 10px;
  padding: 6px 12px;
  color: var(--ink);
  list-style: none;
  border: 1px solid var(--glass-line);
  border-radius: 13px;
  background: var(--glass-soft);
  cursor: pointer;
}
.selector-example summary::-webkit-details-marker { display: none; }
.selector-example summary > span { min-width: 0; display: grid; gap: 1px; }
.selector-example summary small {
  color: var(--ink-faint);
  font-size: 8px;
  font-weight: 680;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.selector-example summary strong { overflow: hidden; font-size: 13px; font-weight: 620; text-overflow: ellipsis; white-space: nowrap; }
.selector-example summary em { overflow: hidden; color: var(--ink-soft); font-size: 9px; font-style: normal; text-overflow: ellipsis; white-space: nowrap; }
.selector-example summary > i {
  width: 8px;
  height: 8px;
  border-right: 1px solid var(--ink-soft);
  border-bottom: 1px solid var(--ink-soft);
  transform: rotate(45deg) translateY(-2px);
  transition: transform .18s ease;
}
.selector-example[open] summary > i { transform: rotate(225deg) translate(-2px, -2px); }
.selector-example__menu {
  position: absolute;
  z-index: 8;
  top: calc(100% + 8px);
  left: 0;
  width: min(350px, calc(100vw - 40px));
  padding: 6px;
  overflow: hidden;
  color: var(--ink);
  border: 1px solid var(--glass-edge);
  border-radius: 16px;
  background:
    linear-gradient(145deg, var(--glass-strong), var(--panel-milk)),
    var(--page-bg);
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(28px) saturate(.9);
  backdrop-filter: blur(28px) saturate(.9);
}
.selector-example__menu button {
  position: relative;
  width: 100%;
  min-height: 53px;
  display: grid;
  gap: 4px;
  padding: 9px 12px 9px 27px;
  color: var(--ink);
  text-align: left;
  border: 0;
  border-bottom: 1px solid var(--glass-line);
  background: transparent;
  cursor: pointer;
}
.selector-example__menu button:last-child { border-bottom: 0; }
.selector-example__menu button::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 18px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ink-faint);
  opacity: .4;
}
.selector-example__menu button.is-active { font-weight: 620; background: var(--glass-soft); }
.selector-example__menu button.is-active::before { background: var(--yellow); opacity: 1; }
.selector-example__menu button span { font-size: 12px; }
.selector-example__menu button small { color: var(--ink-soft); font-size: 9px; }

.selector-steps { display: flex; align-items: center; gap: 10px; }
.selector-steps i { width: 40px; height: 1px; background: var(--glass-line); }
.selector-steps button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 11px;
  color: var(--ink-faint);
  border: 1px solid transparent;
  border-radius: 11px;
  background: transparent;
  cursor: pointer;
  font-size: 12px;
}

.selector-steps button span {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 1px solid var(--glass-line);
  border-radius: 50%;
  font-size: 9px;
}

.selector-steps button[aria-current="step"] { color: var(--ink); background: var(--glass-strong); border-color: var(--glass-edge); }
.selector-steps button[aria-current="step"] span { color: #2c220c; background: var(--yellow); border-color: transparent; }

.selector__body { display: grid; grid-template-columns: minmax(0, 1fr) 330px; min-height: 384px; }

.selector-workspace {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  min-width: 0;
  padding: 18px 24px 13px;
}

.selector-panel { min-height: 278px; animation: panel-in .28s ease both; }
.selector-panel[hidden] { display: none; }
@keyframes panel-in { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: none; } }

.panel-heading { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 14px; }
.panel-heading > span {
  display: grid;
  place-items: center;
  flex: 0 0 32px;
  width: 32px;
  height: 32px;
  border: 1px solid var(--glass-line);
  border-radius: 50%;
  color: var(--ink-faint);
  font-size: 10px;
}

.panel-heading h2 { margin: 0 0 3px; font-size: 23px; font-weight: 560; letter-spacing: -.025em; }
.panel-heading p { margin: 0; color: var(--ink-soft); font-size: 13px; }

.context-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; }
.context-button {
  min-height: 48px;
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 9px 13px;
  color: var(--ink-soft);
  border: 1px solid var(--glass-line);
  border-radius: 14px;
  background: rgba(255,255,255,.06);
  cursor: pointer;
  text-align: left;
  transition: background .18s ease, border-color .18s ease, color .18s ease;
}

.context-button:hover { color: var(--ink); background: var(--glass-soft); }
.context-button[aria-pressed="true"] {
  color: var(--ink);
  border-color: rgba(244, 183, 19, .62);
  background: linear-gradient(120deg, rgba(244, 183, 19, .25), rgba(255,255,255,.12));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.28);
}

.context-icon {
  display: grid;
  place-items: center;
  width: 29px;
  height: 29px;
  border: 1px solid var(--glass-line);
  border-radius: 9px;
  font-size: 9px;
}

.zone-field { display: grid; grid-template-columns: 130px 1fr; align-items: center; gap: 15px; margin-top: 11px; color: var(--ink-soft); font-size: 12px; }
.zone-field select {
  width: 100%;
  height: 40px;
  padding: 0 14px;
  color: var(--ink);
  border: 1px solid var(--glass-line);
  border-radius: 12px;
  outline: 0;
  background: var(--glass-strong);
}

.dimensions-layout { display: grid; grid-template-columns: 250px 1fr; gap: 28px; align-items: stretch; }
.dimension-fields { display: flex; align-items: center; gap: 10px; }
.field { display: grid; gap: 8px; color: var(--ink-soft); font-size: 12px; }
.input-unit {
  display: flex;
  align-items: center;
  min-width: 102px;
  height: 54px;
  padding: 0 13px;
  border: 1px solid var(--glass-line);
  border-radius: 13px;
  background: var(--glass-strong);
}

.input-unit input { width: 60px; color: var(--ink); border: 0; outline: 0; background: transparent; font-size: 22px; font-weight: 580; }
.input-unit b { color: var(--ink-faint); font-size: 12px; }
.input-unit:has(input[aria-invalid="true"]) { border-color: var(--danger); box-shadow: 0 0 0 3px rgba(187,101,79,.12); }

.room-plan {
  position: relative;
  min-height: 205px;
  overflow: hidden;
  border: 1px solid var(--glass-line);
  border-radius: 18px;
  background:
    linear-gradient(var(--glass-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--glass-line) 1px, transparent 1px),
    rgba(255,255,255,.05);
  background-size: 25px 25px;
}

.room-plan__wall { position: absolute; background: var(--ink-soft); opacity: .54; }
.room-plan__wall--top, .room-plan__wall--bottom { left: 52px; right: 42px; height: 4px; }
.room-plan__wall--top { top: 46px; }
.room-plan__wall--bottom { bottom: 46px; }
.room-plan__wall--left, .room-plan__wall--right { top: 46px; bottom: 46px; width: 4px; }
.room-plan__wall--left { left: 52px; }
.room-plan__wall--right { right: 42px; }
.room-plan__desk { position: absolute; width: 62px; height: 30px; border: 1px solid var(--ink-faint); border-radius: 4px; opacity: .6; }
.room-plan__desk::before, .room-plan__desk::after { content: ""; position: absolute; top: 8px; width: 14px; height: 14px; border: 1px solid var(--ink-faint); border-radius: 50%; }
.room-plan__desk::before { left: -20px; } .room-plan__desk::after { right: -20px; }
.room-plan__desk--one { left: 27%; top: 72px; }
.room-plan__desk--two { right: 23%; top: 72px; }
.room-plan__desk--three { left: 27%; bottom: 71px; }
.room-plan__desk--four { right: 23%; bottom: 71px; }
.room-plan__door { position: absolute; left: 50px; bottom: 44px; width: 42px; height: 42px; border: 1px solid var(--ink-faint); border-left: 0; border-bottom: 0; border-radius: 0 42px 0 0; opacity: .5; }
.room-plan__measure { position: absolute; color: var(--ink); background: var(--glass-strong); border: 1px solid var(--glass-line); border-radius: 7px; padding: 4px 8px; font-size: 10px; }
.room-plan__measure--x { left: 50%; bottom: 17px; transform: translateX(-50%); }
.room-plan__measure--y { left: 8px; top: 50%; transform: translateY(-50%); }

.condition-fieldset { padding: 0; margin: 0; border: 0; }
.condition-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; }
.condition-chip { position: relative; cursor: pointer; }
.condition-chip input { position: absolute; opacity: 0; pointer-events: none; }
.condition-chip span {
  min-height: 48px;
  display: flex;
  align-items: center;
  padding: 9px 12px 9px 38px;
  border: 1px solid var(--glass-line);
  border-radius: 13px;
  color: var(--ink-soft);
  background: rgba(255,255,255,.05);
  font-size: 12px;
}
.condition-chip span::before { content: ""; position: absolute; left: 13px; width: 14px; height: 14px; border: 1px solid var(--ink-faint); border-radius: 4px; }
.condition-chip input:checked + span { color: var(--ink); border-color: rgba(244,183,19,.58); background: rgba(244,183,19,.16); }
.condition-chip input:checked + span::before { border-color: var(--yellow); background: var(--yellow); box-shadow: inset 0 0 0 3px rgba(39,31,11,.74); }
.condition-chip input:focus-visible + span { outline: 2px solid var(--yellow); outline-offset: 2px; }
.condition-note { margin: 14px 0 0; display: flex; align-items: center; gap: 8px; color: var(--ink-faint); font-size: 11px; }
.condition-note i, .data-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(111,141,85,.12); }

.selector-nav { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; padding-top: 10px; border-top: 1px solid var(--glass-line); }
.selector-nav button { width: fit-content; min-height: 40px; padding: 0 14px; border: 0; border-radius: 11px; cursor: pointer; }
.selector-nav__back { color: var(--ink-soft); background: transparent; }
.selector-nav__next { justify-self: end; color: #241d0e; background: var(--yellow); font-weight: 650; }
.selector-nav button:disabled { opacity: .35; cursor: default; }
.selector-nav > span { color: var(--ink-faint); font-size: 11px; }

.selector-passport {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 20px;
  color: var(--passport-ink);
  border-left: 1px solid var(--passport-edge);
  background:
    radial-gradient(circle at 20% 0%, rgba(255, 221, 159, .12), transparent 30%),
    var(--passport);
  box-shadow: inset 1px 0 0 rgba(255,255,255,.08);
  -webkit-backdrop-filter: blur(30px) saturate(.88);
  backdrop-filter: blur(30px) saturate(.88);
}

.passport-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.passport-head span { color: var(--passport-soft); font-size: 11px; }
.passport-head strong { color: #9ab77b; font-size: 9px; letter-spacing: .08em; }
.selector-passport.is-warning .passport-head strong { color: #e2b66c; }
.selector-passport.is-danger .passport-head strong { color: #e09a86; }

.passport-metrics { display: grid; grid-template-columns: 1fr 1fr; margin: 18px 0 0; }
.passport-metrics > div { padding: 9px 0; border-top: 1px solid rgba(255,255,255,.12); }
.passport-metrics > div:nth-child(even) { padding-left: 14px; border-left: 1px solid rgba(255,255,255,.12); }
.passport-metrics__class { grid-column: 1 / -1; }
.passport-metrics dt { color: var(--passport-soft); font-size: 10px; }
.passport-metrics dd { margin: 5px 0 0; font-size: 19px; line-height: 1; letter-spacing: -.025em; }
.passport-metrics__class dd { font-size: 38px; font-weight: 470; }
.passport-note { min-height: 42px; margin: 10px 0 12px; color: var(--passport-soft); font-size: 10px; line-height: 1.42; }
.primary-action { width: 100%; min-height: 46px; padding: 0 15px; border-radius: 12px; font-size: 12px; }
.primary-action[aria-disabled="true"] { opacity: .46; pointer-events: none; }
.selector-passport > small { margin-top: 9px; color: rgba(255,255,255,.42); text-align: center; font-size: 8px; }

.chapter {
  width: min(calc(100% - (var(--page-pad) * 2)), var(--page-max));
  margin: 0 auto;
  padding: 36px 0;
}

.chapter-heading { margin: 0 18px 24px; }
.chapter-heading h2, .materials-head h2 {
  margin: 0;
  font-size: clamp(38px, 3.3vw, 52px);
  font-weight: 480;
  line-height: 1.02;
  letter-spacing: -.045em;
}

.calculation-proof {
  min-height: 444px;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(360px, .75fr);
  gap: 14px;
  padding: 14px;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(145deg, rgba(255,255,255,.12), transparent 35%),
    var(--panel-clear);
}
.calculation-proof__scene {
  position: relative;
  min-width: 0;
  min-height: 414px;
  overflow: hidden;
  border: 1px solid var(--glass-edge);
  border-radius: 19px;
  background-image: none;
  background-position: center 70%;
  background-size: cover;
  background-repeat: no-repeat;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.18);
}
.calculation-proof__scene::after {
  content: "";
  position: absolute;
  inset: 45% 0 0;
  background: linear-gradient(180deg, transparent, rgba(18,16,13,.48));
}
.calculation-proof__scene-label {
  position: absolute;
  z-index: 2;
  left: 18px;
  bottom: 18px;
  max-width: min(340px, calc(100% - 36px));
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  color: #fff8e9;
  border: 1px solid rgba(255,255,255,.24);
  border-radius: 13px;
  background: rgba(24,21,17,.48);
  -webkit-backdrop-filter: blur(18px) saturate(.84);
  backdrop-filter: blur(18px) saturate(.84);
}
.calculation-proof__scene-label span { color: rgba(255,248,233,.62); font-size: 8px; font-weight: 680; letter-spacing: .13em; text-transform: uppercase; }
.calculation-proof__scene-label strong { font-size: 14px; font-weight: 560; }
.calculation-proof__facts { min-width: 0; display: grid; grid-template-rows: auto repeat(3, 1fr); padding: 5px 17px; }
.calculation-proof__facts header { min-height: 45px; display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.calculation-proof__facts header span { color: var(--ink-faint); font-size: 9px; font-weight: 680; letter-spacing: .13em; text-transform: uppercase; }
.calculation-proof__facts header strong { color: var(--green); font-size: 10px; font-weight: 650; }
.calculation-proof__facts header strong[data-tone="warning"] { color: #d49b41; }
.calculation-proof__facts header strong[data-tone="danger"] { color: var(--danger); }
.calculation-proof__facts article {
  min-width: 0;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--glass-line);
}
.calculation-proof__index {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  color: var(--ink-faint);
  border: 1px solid var(--glass-line);
  border-radius: 50%;
  font-size: 9px;
}
.calculation-proof__facts article small { color: var(--ink-faint); font-size: 8px; font-weight: 680; letter-spacing: .12em; text-transform: uppercase; }
.calculation-proof__facts h3 { margin: 6px 0 5px; font-size: 24px; font-weight: 480; line-height: 1.05; letter-spacing: -.035em; }
.calculation-proof__facts h3 b { font-weight: 590; }
.calculation-proof__facts p { margin: 0; color: var(--ink-soft); font-size: 10px; line-height: 1.42; }

.materials-head { display: grid; grid-template-columns: 1fr 360px; align-items: end; gap: 30px; margin: 0 18px 24px; }
.materials-head > p { margin: 0; color: var(--ink-soft); font-size: 13px; line-height: 1.5; }
.material-library {
  padding: 14px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background:
    linear-gradient(165deg, rgba(255,255,255,.12), transparent 42%),
    var(--panel-clear);
}
.material-runway { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; min-height: 354px; }
.material-panel {
  position: relative;
  min-height: 354px;
  overflow: hidden;
  color: #fff9ec;
  border: 1px solid var(--glass-edge);
  border-radius: 18px;
  background: rgba(24,22,18,.48);
  text-decoration: none;
}
.material-panel::before { content: ""; position: absolute; inset: 0; z-index: 1; background: linear-gradient(180deg, rgba(22,20,16,.02) 28%, rgba(22,20,16,.90) 88%); }
.material-panel img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.72); transition: transform .35s ease; }
.material-panel:hover img { transform: scale(1.025); }
.material-panel__body { position: absolute; z-index: 2; inset: auto 0 0; padding: 18px; }
.material-panel__index { display: flex; justify-content: space-between; gap: 10px; color: rgba(255,255,255,.62); font-size: 9px; text-transform: uppercase; letter-spacing: .08em; }
.material-panel h3 { margin: 13px 0 4px; font-size: 22px; font-weight: 560; letter-spacing: -.03em; }
.material-panel__body > p { margin: 0; color: #f6c64a; font-size: 13px; }
.material-panel__meta { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 13px; }
.material-panel__meta span { padding: 5px 7px; border: 1px solid rgba(255,255,255,.18); border-radius: 999px; color: rgba(255,255,255,.74); font-size: 8px; }
.material-library__footer { min-height: 44px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 12px 8px 0; color: var(--ink-soft); font-size: 10px; }
.material-library__footer p { display: flex; align-items: center; gap: 9px; margin: 0; }
.material-library__footer a { font-weight: 600; text-decoration: none; }
.loading-copy { grid-column: 1 / -1; place-self: center; color: var(--ink-soft); font-size: 13px; }

.chapter-heading--split { display: grid; grid-template-columns: 1fr 350px; align-items: end; gap: 30px; }
.chapter-heading--split > p { margin: 0; color: var(--ink-soft); font-size: 13px; line-height: 1.5; }
.knowledge-stage {
  display: grid;
  grid-template-columns: 1.18fr .82fr;
  grid-template-rows: 220px 220px;
  gap: 10px;
  padding: 12px;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(145deg, rgba(255,255,255,.12), transparent 34%),
    var(--panel-clear);
}
.knowledge-story {
  position: relative;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, var(--panel-milk), var(--panel-clear));
  text-decoration: none;
}
.knowledge-story--measure { grid-row: 1 / 3; display: grid; grid-template-rows: 292px 1fr; }
.knowledge-story--width, .knowledge-story--reserve { display: grid; grid-template-columns: 44% 1fr; }
.knowledge-story__index { position: absolute; z-index: 2; left: 17px; top: 16px; color: rgba(255,255,255,.82); font-size: 10px; }
.knowledge-story__photo { min-height: 0; background-color: var(--glass-soft); background-repeat: no-repeat; background-size: contain; }
.knowledge-story--measure .knowledge-story__photo {
  background-image: none;
  background-position: center;
  background-size: contain;
}
.knowledge-story--measure .knowledge-story__photo { background-position-y: 54%; }
.knowledge-story--width .knowledge-story__photo {
  background-image: none;
  background-position: center;
  background-size: contain;
}
.knowledge-story--reserve .knowledge-story__photo {
  background-image: none;
  background-position: center;
  background-size: contain;
}
.knowledge-story > div:last-child { align-self: center; padding: 22px; }
.knowledge-story h3 { margin: 0 0 9px; font-size: 25px; font-weight: 520; line-height: 1.04; letter-spacing: -.035em; }
.knowledge-story p { margin: 0; color: var(--ink-soft); font-size: 12px; line-height: 1.45; }
.knowledge-story em { display: inline-block; margin-top: 18px; color: var(--ink); font-size: 10px; font-style: normal; font-weight: 650; text-transform: uppercase; letter-spacing: .08em; }

.faq-shell {
  display: grid;
  grid-template-columns: 310px 1fr;
  min-height: 346px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background:
    linear-gradient(110deg, var(--panel-milk) 0 24%, var(--panel-warm) 55%, var(--panel-clear));
}
.faq-shell[data-pilot-faq] { overflow-anchor: none; }
.faq-intro { padding: 34px; border-right: 1px solid var(--glass-line); }
.faq-intro h2 { margin: 0; font-size: 47px; line-height: .98; font-weight: 480; letter-spacing: -.05em; }
.faq-intro > p:last-child { margin: 24px 0 0; color: var(--ink-soft); font-size: 12px; line-height: 1.5; }
.faq-list { padding: 19px 30px; }
.faq-list details { border-bottom: 1px solid var(--glass-line); }
.faq-list summary { position: relative; list-style: none; cursor: pointer; padding: 18px 36px 18px 0; font-size: 14px; font-weight: 560; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span::before, .faq-list summary span::after { content: ""; position: absolute; right: 2px; top: 50%; width: 13px; height: 1px; background: var(--ink-soft); }
.faq-list summary span::after { transform: rotate(90deg); transition: transform .2s ease; }
.faq-list details[open] summary span::after { transform: rotate(0); }
.faq-list details p { margin: -4px 48px 18px 0; color: var(--ink-soft); font-size: 12px; line-height: 1.5; }

.final-cta {
  min-height: 244px;
  display: grid;
  grid-template-columns: 270px 1fr 270px;
  align-items: center;
  gap: 24px;
  overflow: hidden;
  border: 1px solid var(--glass-edge);
  border-radius: var(--radius-xl);
  background-image: var(--cta-wash);
  background-size: 100% 100%, cover;
  background-position: center, center;
  background-repeat: no-repeat;
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,.18);
}
.final-cta > div:nth-child(2) {
  z-index: 2;
  padding: 24px 30px;
  border: 1px solid var(--glass-edge);
  border-radius: 20px;
  background: linear-gradient(145deg, var(--panel-milk), var(--panel-warm));
  -webkit-backdrop-filter: blur(22px) saturate(1.02);
  backdrop-filter: blur(22px) saturate(1.02);
}
.final-cta h2 { margin: 0 0 20px; font-size: 43px; line-height: 1.02; font-weight: 480; letter-spacing: -.045em; }
.primary-action--light { width: auto; min-height: 44px; padding: 0 18px; }
.final-cta__roll, .final-cta__tools { align-self: stretch; visibility: hidden; }

.site-footer {
  width: min(calc(100% - (var(--page-pad) * 2)), var(--page-max));
  min-height: 250px;
  margin: 18px auto 30px;
  display: grid;
  grid-template-columns: 1.4fr .7fr .9fr .7fr;
  gap: 40px;
  padding: 36px 40px 58px;
  color: var(--passport-ink);
  border-color: var(--passport-edge);
  border-radius: var(--radius-xl);
  background: var(--footer);
  -webkit-backdrop-filter: blur(28px) saturate(.86);
  backdrop-filter: blur(28px) saturate(.86);
}
.site-footer p { color: var(--passport-soft); font-size: 11px; line-height: 1.6; }
.site-footer nav, .site-footer__catalog, .site-footer__contact { display: flex; flex-direction: column; gap: 9px; font-size: 11px; }
.site-footer strong { margin-bottom: 4px; color: var(--passport-soft); font-size: 9px; letter-spacing: .12em; text-transform: uppercase; }
.site-footer nav a, .site-footer__catalog a, .site-footer__contact a { color: var(--passport-ink); text-decoration: none; }
.site-footer__catalog span { margin-top: 18px; color: var(--passport-soft); }
.site-footer__contact span, .site-footer__contact small { color: var(--passport-soft); }
.site-footer__contact small { margin-top: 9px; line-height: 1.45; }
.site-footer__phone { font-size: 16px; font-weight: 650; letter-spacing: -.02em; }
.site-footer__bottom { position: absolute; left: 40px; right: 40px; bottom: 22px; display: flex; justify-content: space-between; padding-top: 14px; border-top: 1px solid rgba(255,255,255,.10); color: rgba(255,255,255,.42); font-size: 9px; }
.noscript { position: relative; z-index: 3; margin: 0; padding: 12px; background: #fff1bf; color: #2b230f; text-align: center; }

:focus-visible { outline: 2px solid var(--yellow-strong); outline-offset: 3px; }

@media (max-width: 800px) {
  :root {
    --page-pad: 14px;
    --radius-xl: 24px;
    --radius-lg: 18px;
  }

  html[data-scene="day"] {
    --mobile-top-x: 18%;
    --mobile-mid-x: 28%;
    --mobile-low-x: 66%;
    --mobile-four-x: 10%;
    --mobile-five-x: 60%;
    --mobile-six-x: 36%;
    --mobile-story-x: 50%;
    --glass-strong: rgba(255, 251, 243, .18);
    --panel-milk: rgba(255, 250, 239, .18);
    --panel-warm: rgba(230, 209, 176, .11);
  }

  html[data-scene="night"] {
    --mobile-top-x: 18%;
    --mobile-mid-x: 28%;
    --mobile-low-x: 66%;
    --mobile-four-x: 10%;
    --mobile-five-x: 60%;
    --mobile-six-x: 36%;
    --mobile-story-x: 50%;
    --glass-strong: rgba(54, 45, 33, .17);
    --panel-milk: rgba(53, 43, 31, .15);
    --panel-warm: rgba(69, 49, 28, .11);
  }

  body {
    min-width: 320px;
    overflow-x: hidden;
  }

  .room-world__plate {
    left: -5%;
    width: 110%;
    background-size: cover;
    transform: none;
    -webkit-mask-image: linear-gradient(180deg, transparent, #000 8%, #000 92%, transparent);
    mask-image: linear-gradient(180deg, transparent, #000 8%, #000 92%, transparent);
  }

  .room-world__plate--top {
    top: -140px;
    height: 1420px;
    background-position: var(--mobile-top-x) center;
  }

  .room-world__plate--middle {
    top: 1150px;
    height: 1510px;
    background-position: var(--mobile-mid-x) center;
  }

  .room-world__plate--lower {
    top: 2510px;
    height: 1480px;
    background-position: var(--mobile-low-x) center;
  }

  .room-world__plate--mobile-four,
  .room-world__plate--mobile-five,
  .room-world__plate--mobile-six { display: block; }

  .room-world__plate--mobile-four {
    top: 3830px;
    height: 1500px;
    background-position: var(--mobile-four-x) center;
  }

  .room-world__plate--mobile-five {
    top: 5140px;
    height: 1400px;
    background-position: var(--mobile-five-x) center;
  }

  .room-world__plate--mobile-six {
    top: 6290px;
    height: 1050px;
    background-position: var(--mobile-six-x) center;
  }

  .site-header {
    width: calc(100% - (var(--page-pad) * 2));
    height: 64px;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
  }

  .top-nav { display: none; }
  .brand { min-height: 44px; gap: 2px; }
  .skip-link { min-height: 44px; }
  .brand__mark { width: 26px; height: 26px; }
  .brand__wordmark { font-size: 16px; }
  .header-actions { gap: 6px; }
  .scene-switch { padding: 3px; }
  .scene-switch button {
    min-width: 52px;
    height: 44px;
    padding: 0 7px;
    font-size: 10px;
  }
  .scene-switch button span { margin-right: 3px; font-size: 12px; }
  .catalog-button {
    min-width: 84px;
    min-height: 44px;
    padding: 0 9px;
    gap: 5px;
    font-size: 0;
  }
  .catalog-button::before { content: "bood.by"; font-size: 11px; }
  .catalog-button span { font-size: 11px; }

  .hero {
    width: calc(100% - (var(--page-pad) * 2));
    padding: 25px 0 30px;
  }

  .hero__intro {
    width: auto;
    margin: 18px 4px 23px;
  }

  .hero__intro h1 {
    max-width: none;
    font-size: clamp(42px, 11.8vw, 46px);
    line-height: .96;
  }

  .hero__intro > p:last-child {
    width: auto;
    max-width: 300px;
    margin-top: 16px;
    font-size: 14px;
  }

  .selector__topbar {
    min-height: 0;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
    padding: 14px;
  }

  .selector__summary strong { font-size: 15px; }
  .selector-example { width: 100%; }
  .selector-example summary { min-height: 56px; }
  .selector-example summary strong { font-size: 14px; }
  .selector-example summary em { font-size: 10px; }
  .selector-example__menu { position: static; width: 100%; margin-top: 8px; }
  .selector-steps {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
  }
  .selector-steps i { display: none; }
  .selector-steps button {
    min-width: 0;
    min-height: 44px;
    justify-content: center;
    gap: 5px;
    padding: 0 3px;
    font-size: 10px;
  }
  .selector-steps button span { width: 22px; height: 22px; font-size: 8px; }

  .selector__body {
    grid-template-columns: minmax(0, 1fr);
    min-height: 0;
  }

  .selector-workspace {
    padding: 16px 14px 14px;
  }

  .selector-panel { min-height: 0; padding-bottom: 18px; }
  .panel-heading { margin-bottom: 15px; }
  .panel-heading > span { flex-basis: 30px; width: 30px; height: 30px; }
  .panel-heading h2 { font-size: 21px; }
  .panel-heading p { font-size: 12px; line-height: 1.35; }

  .context-list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .context-button { min-height: 52px; padding: 8px 10px; gap: 8px; font-size: 12px; }
  .context-icon { flex: 0 0 28px; width: 28px; height: 28px; }
  .zone-field {
    grid-template-columns: 1fr;
    gap: 7px;
    margin-top: 12px;
  }
  .zone-field select { height: 44px; }

  .dimensions-layout { grid-template-columns: 1fr; gap: 16px; }
  .dimension-fields {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    gap: 8px;
  }
  .field { min-width: 0; }
  .input-unit { min-width: 0; width: 100%; height: 52px; padding: 0 11px; }
  .input-unit input { min-width: 0; width: 100%; height: 100%; font-size: 20px; }
  .room-plan { min-height: 205px; }
  .room-plan__desk { width: 48px; }
  .room-plan__desk--one, .room-plan__desk--three { left: 27%; }
  .room-plan__desk--two, .room-plan__desk--four { right: 18%; }
  .dimension-error {
    margin: -4px 0 2px;
    color: var(--danger);
    font-size: 11px;
    line-height: 1.4;
  }

  .condition-list { grid-template-columns: 1fr; gap: 8px; }
  .condition-chip span { min-height: 48px; }
  .condition-note { align-items: flex-start; line-height: 1.4; }
  .condition-note i { flex: 0 0 7px; margin-top: 4px; }

  .selector-nav { padding-top: 12px; }
  .selector-nav button { min-height: 44px; padding: 0 12px; }

  .selector-passport {
    padding: 19px 18px 18px;
    border-top: 1px solid var(--passport-edge);
    border-left: 0;
    box-shadow: inset 0 1px 0 rgba(255,255,255,.08);
    scroll-margin-top: 12px;
  }
  .passport-metrics { margin-top: 16px; }
  .passport-metrics dd { font-size: 18px; }
  .passport-metrics__class dd { font-size: 34px; }
  .passport-note { min-height: 0; font-size: 11px; }
  .primary-action { min-height: 48px; }

  .chapter {
    width: calc(100% - (var(--page-pad) * 2));
    padding: 30px 0;
  }

  .chapter-heading, .materials-head { margin: 0 4px 18px; }
  .chapter-heading h2, .materials-head h2 { font-size: clamp(34px, 9.8vw, 38px); }

  .calculation-proof {
    min-height: 0;
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 10px;
  }
  .calculation-proof__scene { min-height: 232px; background-position-y: 72%; }
  .calculation-proof__scene-label { left: 13px; right: 13px; bottom: 13px; max-width: none; }
  .calculation-proof__facts { padding: 5px 11px; }
  .calculation-proof__facts header { min-height: 48px; }
  .calculation-proof__facts article { min-height: 116px; padding: 14px 0; }
  .calculation-proof__facts h3 { font-size: 23px; }
  .calculation-proof__facts p { font-size: 11px; }

  .materials-head {
    display: grid;
    grid-template-columns: 1fr;
    gap: 13px;
  }
  .material-library { padding: 10px; }
  .material-runway {
    display: flex;
    min-height: 0;
    gap: 10px;
    padding-bottom: 6px;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
  }
  .material-runway::-webkit-scrollbar { display: none; }
  .material-panel {
    flex: 0 0 87%;
    min-height: 370px;
    scroll-snap-align: start;
  }
  .material-panel__index { font-size: 10px; }
  .material-panel__meta span { padding: 6px 8px; font-size: 10px; }
  .material-library__footer {
    min-height: 0;
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
    padding: 12px 6px 2px;
    font-size: 11px;
  }
  .material-library__footer p { line-height: 1.4; }
  .material-library__footer a { min-height: 44px; display: flex; align-items: center; font-size: 12px; }

  .chapter-heading--split { grid-template-columns: 1fr; gap: 13px; }
  .knowledge-stage {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    gap: 10px;
    padding: 10px;
  }
  .knowledge-story--measure {
    grid-row: auto;
    grid-template-rows: 210px auto;
  }
  .knowledge-story--width, .knowledge-story--reserve {
    min-height: 180px;
    grid-template-columns: 42% 1fr;
  }
  .knowledge-story--width .knowledge-story__photo,
  .knowledge-story--reserve .knowledge-story__photo {
    background-size: auto 100%;
    background-position: var(--mobile-story-x) center;
  }
  .knowledge-story > div:last-child { padding: 16px; }
  .knowledge-story h3 { font-size: 21px; }
  .knowledge-story em { margin-top: 14px; }

  .faq-shell {
    grid-template-columns: 1fr;
    min-height: 0;
  }
  .faq-intro {
    padding: 24px;
    border-right: 0;
    border-bottom: 1px solid var(--glass-line);
  }
  .faq-intro h2 { font-size: 38px; }
  .faq-intro > p:last-child { margin-top: 18px; }
  .faq-list { padding: 8px 20px 14px; }
  .faq-list summary { min-height: 56px; padding: 16px 34px 16px 0; line-height: 1.35; }
  .faq-list details p { margin: -2px 26px 18px 0; }

  .final-cta {
    min-height: 348px;
    grid-template-columns: 1fr;
    align-items: end;
    gap: 0;
    padding: 16px;
    background-size: 100% 100%, 200% auto;
  }
  .final-cta__roll, .final-cta__tools { display: none; }
  .final-cta > div:nth-child(2) {
    grid-column: 1;
    padding: 22px;
  }
  .final-cta h2 { font-size: 32px; }
  .primary-action--light { min-height: 46px; }

  .site-footer {
    position: relative;
    width: calc(100% - (var(--page-pad) * 2));
    min-height: 0;
    margin: 12px auto 22px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 18px;
    padding: 26px 20px 20px;
  }
  .site-footer__brand, .site-footer__catalog, .site-footer__contact, .site-footer__bottom { grid-column: 1 / -1; }
  .site-footer nav, .site-footer__catalog, .site-footer__contact { gap: 0; }
  .site-footer strong { margin-bottom: 8px; }
  .site-footer nav a, .site-footer__catalog a, .site-footer__contact a {
    min-height: 44px;
    display: flex;
    align-items: center;
  }
  .site-footer__catalog span { margin-top: 4px; }
  .site-footer__contact span { margin-bottom: 4px; }
  .site-footer__contact small { margin-top: 4px; }
  .site-footer__bottom {
    position: static;
    display: flex;
    flex-direction: column;
    gap: 7px;
    padding-top: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

@supports not ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  html[data-scene="day"] {
    --glass: rgba(248, 240, 224, .88);
    --glass-strong: rgba(252, 246, 234, .94);
    --glass-soft: rgba(242, 232, 214, .82);
    --panel-clear: rgba(239, 228, 208, .90);
    --panel-milk: rgba(252, 246, 234, .95);
    --panel-warm: rgba(232, 213, 183, .91);
  }

  html[data-scene="night"] {
    --glass: rgba(31, 26, 20, .90);
    --glass-strong: rgba(42, 34, 26, .94);
    --glass-soft: rgba(35, 29, 22, .86);
    --panel-clear: rgba(27, 23, 18, .92);
    --panel-milk: rgba(43, 35, 26, .95);
    --panel-warm: rgba(54, 39, 24, .92);
  }

  .glass,
  .site-header,
  .site-footer,
  .selector-passport,
  .pilot-page .lselector,
  .pilot-page .lselector__builder,
  .pilot-page .lselector__passport {
    -webkit-backdrop-filter: none !important;
    backdrop-filter: none !important;
  }
}

/* Locked readability contract. Buyer-facing desktop copy grows gently from
   15px to 16px on wide screens; decorative overlines remain compact. */
:root {
  --type-meaningful-min: clamp(15px, calc(13.5px + .1vw), 16px);
  --type-secondary: clamp(14px, calc(12.8px + .08vw), 15px);
  --type-reading-emphasis: clamp(16px, calc(14.5px + .1vw), 17px);
  --type-action: clamp(15px, calc(13.5px + .1vw), 16px);
  --type-card-title: clamp(17px, calc(15.5px + .1vw), 18px);
  --type-overline: 10px;
}

.dos-passport-chip,
.decision-showroom__head > span,
.dos-product-card__state,
.dos-product-card__brand,
.dos-product-card__meta,
.dos-product-card__meta span,
.decision-start__choice small,
.selector-example summary em,
.selector-example__menu button small,
.condition-note,
.selector-nav > span,
.passport-head span,
.passport-metrics dt,
.passport-note,
.selector-passport > small,
.calculation-proof__facts header strong,
.calculation-proof__facts article small,
.calculation-proof__facts p,
.material-panel__index,
.material-panel__meta span,
.material-library__footer,
.knowledge-story p,
.faq-intro > p:last-child,
.faq-list details p,
.dos-passport-bridge__note,
.dos-passport-bridge__fact small,
.dos-button,
.site-footer p,
.site-footer nav,
.site-footer__catalog,
.site-footer__contact,
.site-footer strong,
.site-footer__bottom {
  font-size: var(--type-meaningful-min);
}

.dos-passport-bridge__eyebrow,
.selector__summary span,
.passport-head strong,
.calculation-proof__scene-label span,
.calculation-proof__facts header span,
.knowledge-story__index,
.knowledge-story em {
  font-size: var(--type-overline);
}

.site-footer__bottom { color: rgba(255,255,255,.68); }

@media (max-width: 800px) {
  :root {
    --type-meaningful-min: 14px;
    --type-secondary: 14px;
    --type-reading-emphasis: 15px;
    --type-action: 15px;
    --type-card-title: 17px;
  }
}

@media (min-width: 801px) {
  .top-nav a,
  .scene-switch button { font-size: var(--type-secondary); }
  .catalog-button { font-size: var(--type-action); }
}