@import url("../../design-system/tokens/spacing.css");
@import url("../../design-system/tokens/surface-colors.css");

/* Explicit cascade order prevents selector-specificity regressions. */
@layer base, presentation;
@layer base {
:root {
  color-scheme: light;
  --paper: var(--lh-case-paper);
  --paper-bright: var(--lh-case-paper-soft);
  --ink: var(--lh-case-ink);
  --ink-soft: var(--lh-case-ink-soft);
  --ink-muted: var(--lh-case-ink-muted);
  --ink-deep: var(--lh-case-ink-deep);
  --line: var(--lh-case-line);
  --line-strong: var(--lh-case-line-strong);
  --coral: var(--lh-case-coral);
  --coral-soft: var(--lh-case-coral-soft);
  --coral-hot: var(--lh-case-coral-hot);
  --coral-pale: var(--lh-case-coral-pale);
  --charcoal: var(--lh-case-charcoal);
  --cobalt: var(--lh-case-cobalt);
  --cobalt-contrast: var(--lh-case-cobalt-contrast);
  --charcoal-contrast: var(--lh-case-charcoal-contrast);
  --coral-contrast: var(--lh-case-coral-contrast);
  --mint: var(--lh-case-mint);
  --amber: var(--lh-case-amber);
  --amber-bright: var(--lh-case-amber-bright);
  --red: var(--lh-case-red);
  --font-sans: var(--lh-font-sans);
  --font-mono: var(--lh-font-mono);
  --page-pad: clamp(20px, 3vw, 48px);
  --section-gap: var(--lh-space-section);
  --content-max: 1480px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
  scrollbar-color: var(--coral) var(--paper);
  scrollbar-width: thin;
}
html::-webkit-scrollbar { width: 8px; }
html::-webkit-scrollbar-track { background: var(--paper); }
html::-webkit-scrollbar-thumb { background: var(--coral); }
body {
  margin: 0;
  min-width: 320px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: rgba(217, 70, 50, 0.16);
  overflow-x: clip;
}

h1, h2, h3 { overflow-wrap: normal; word-break: normal; hyphens: none; }
p, li, dd, a, button, strong, span { overflow-wrap: break-word; }
main *, header *, footer * { min-width: 0; }

::selection { background: var(--coral); color: #fff; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 4px; }
button, input { font: inherit; }
button { color: inherit; }
svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.icon-symbols { position: absolute; width: 0; height: 0; overflow: hidden; pointer-events: none; }

.skip-link {
  position: fixed;
  inset: 12px auto auto 12px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--ink);
  color: var(--paper-bright);
  transform: translateY(-160%);
  transition: transform 180ms var(--ease-out);
}
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid #fff; outline-offset: 3px; box-shadow: 0 0 0 6px var(--ink); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: minmax(190px, 1fr) auto minmax(190px, 1fr);
  align-items: center;
  min-height: 72px;
  padding: 0 var(--page-pad);
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.brand { display: inline-flex; align-items: center; gap: 11px; width: max-content; min-height: 44px; font-weight: 600; text-decoration: none; }
.primary-nav { display: flex; align-items: center; gap: clamp(20px, 2.3vw, 40px); }
.primary-nav a { position: relative; display: inline-flex; align-items: center; min-height: 44px; color: var(--ink-soft); font-size: 14px; text-decoration: none; }
.primary-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -9px; height: 2px; background: var(--coral); transition: right 220ms var(--ease-out); }
.primary-nav a[aria-current="true"] { color: var(--ink); }
.primary-nav a[aria-current="true"]::after { right: 0; }
.header-actions { justify-self: end; display: flex; align-items: center; gap: var(--lh-space-3); }
.language-switch { display: inline-flex; align-items: center; gap: 2px; padding: 2px; background: var(--paper-bright); }
.language-switch a { display: grid; place-items: center; min-width: 44px; min-height: 44px; padding: 4px 8px; color: var(--ink-soft); font-family: var(--font-mono); font-size: 10px; text-decoration: none; }
.language-switch a[aria-current="page"] { background: var(--ink); color: #fff; }
.map-button { display: grid; place-items: center; width: 44px; height: 44px; padding: 0; border: 0; background: transparent; cursor: pointer; }
.map-button svg { width: 20px; height: 20px; }
.reading-progress { position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; pointer-events: none; }
.reading-progress span { display: block; width: 0; height: 100%; background: var(--coral); transform-origin: left; }

.project-drawer {
  position: fixed;
  z-index: 60;
  inset: 0 0 0 auto;
  width: min(480px, 100%);
  padding: 28px clamp(24px, 4vw, 48px) 48px;
  background: var(--ink);
  color: var(--paper-bright);
  transform: translateX(100%);
  visibility: hidden;
  transition: transform 420ms var(--ease-out), visibility 0s linear 420ms;
  overflow-y: auto;
  overscroll-behavior: contain;
}
.project-drawer.is-open { transform: translateX(0); visibility: visible; transition-delay: 0s; }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: var(--lh-space-4); }
.drawer-head p { display: flex; align-items: center; gap: var(--lh-space-3); margin: 0; font-weight: 600; }
.drawer-head p svg { width: 20px; height: 20px; color: #ff8472; }
.drawer-head button { display: grid; place-items: center; width: 44px; height: 44px; border: 0; padding: 0; background: transparent; color: #d7d4cc; cursor: pointer; }
.drawer-head button svg { width: 22px; height: 22px; }
.chapter-list { list-style: none; margin: var(--lh-space-8) 0 0; padding: 0; }
.chapter-list li > * { display: grid; grid-template-columns: 34px 1fr; align-items: center; margin-bottom: var(--lh-space-1); padding: 12px 14px; color: var(--ink-muted); text-decoration: none; }
.chapter-list a { background: var(--ink-deep); }
.chapter-list li span { font: 500 9px/1 var(--font-mono); letter-spacing: .06em; font-variant-numeric: tabular-nums; }
.chapter-list .is-current > * { color: #fff; }
.chapter-list .is-current span { color: var(--coral-hot); }
.chapter-list .is-complete > * { color: #c8c6bf; }
.chapter-list .is-final { margin-top: var(--lh-space-5); }
.chapter-list .is-final > * { background: var(--coral); color: #fff; }
.chapter-list .is-final span, .chapter-list .is-final.is-current span { color: var(--coral-contrast); }
.drawer-backdrop { position: fixed; z-index: 50; inset: 0; background: rgba(23, 23, 20, 0.32); }

main { overflow: clip; }
.hero, .section, .site-footer { width: min(100%, var(--content-max)); margin-inline: auto; padding-inline: var(--page-pad); }
.hero {
  position: relative;
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr) minmax(250px, 0.28fr);
  grid-template-rows: 1fr auto;
  gap: 56px clamp(36px, 5vw, 84px);
  width: 100%;
  max-width: none;
  min-height: calc(100svh - 72px);
  padding-top: clamp(56px, 8vw, 120px);
  padding-bottom: 0;
  background: var(--coral);
  color: #fff;
  isolation: isolate;
}
.hero-index { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; padding-top: 16px; font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; }
.hero-index > * { white-space: nowrap; }
.hero-index::before { content: ""; width: 1px; height: 88px; margin: 0 0 8px 6px; background: #fff; }
.hero-index strong { color: #fff; font-size: 28px; font-weight: 500; letter-spacing: -.04em; }
.hero-copy :is(h1, h2) { max-width: 10.5ch; margin: 0; font-size: clamp(64px, 8.4vw, 128px); font-weight: 500; letter-spacing: -.04em; line-height: .88; text-wrap: balance; }
@media (min-width: 901px) {
  html[lang="ru"] .foundation-hero .hero-copy h1 { max-width: none; font-size: clamp(64px, 7vw, 100px); line-height: .92; }
}
.hero-lead { max-width: 58ch; margin: 36px 0 24px; color: #f6d8d4; font-size: clamp(17px, 1.4vw, 20px); line-height: 1.55; text-wrap: pretty; }
.text-link { display: inline-flex; gap: 8px; align-items: center; min-height: 44px; font-weight: 600; }
.hero-map { align-self: start; padding-top: 16px; border-left: 1px solid rgba(255,255,255,.45); padding-left: 24px; }
.hero-map > p { margin: 0 0 20px; font-family: var(--font-mono); color: var(--coral-pale); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.hero-map ol { list-style: none; margin: 0; padding: 0; }
.hero-map li { display: grid; grid-template-columns: 52px 1fr; gap: 8px; padding: 8px 0; color: #f6d8d4; font-size: 13px; }
.hero-map .is-current { color: #fff; }
.hero-map .is-current span { color: #fff; }
.hero-map strong { font-weight: 600; }

.tension-tool { grid-column: 1 / -1; align-self: end; margin: 0; padding: var(--lh-space-6); border-top: 0; background: #fff; color: var(--ink); }
.tension-head { display: flex; justify-content: space-between; gap: 24px; align-items: baseline; }
.tension-head h2 { margin: 0; font-size: 15px; font-weight: 600; }
.tension-head output { color: var(--coral); font-size: 14px; }
.range-wrap { position: relative; padding: 28px 0 32px; }
.range-wrap input { width: 100%; height: 28px; margin: 0; appearance: none; background: transparent; cursor: ew-resize; }
.range-wrap input::-webkit-slider-runnable-track { height: 1px; background: var(--ink); }
.range-wrap input::-moz-range-track { height: 1px; background: var(--ink); }
.range-wrap input::-webkit-slider-thumb { appearance: none; width: 18px; height: 18px; margin-top: -8.5px; border: 4px solid var(--paper); border-radius: 50%; background: var(--coral); box-shadow: 0 0 0 1px var(--coral); }
.range-wrap input::-moz-range-thumb { width: 12px; height: 12px; border: 4px solid var(--paper); border-radius: 50%; background: var(--coral); box-shadow: 0 0 0 1px var(--coral); }
.range-labels { display: flex; justify-content: space-between; margin-top: 8px; font-size: 13px; }
.tension-note { min-height: 24px; margin: 0; color: var(--ink-soft); font-size: 13px; }

.case-overview { padding-top: var(--lh-space-20); }
.case-overview-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--lh-space-2); }
.case-overview-grid article { min-height: 260px; padding: var(--lh-space-6); background: var(--paper-bright); }
.case-overview-grid article:first-child { background: var(--cobalt); color: #fff; }
.case-overview-grid article:last-child { background: var(--coral); color: #fff; }
.case-overview-grid span { font-family: var(--font-mono); font-size: 10px; letter-spacing: .06em; text-transform: uppercase; }
.case-overview-grid h3 { max-width: 18ch; margin: var(--lh-space-16) 0 var(--lh-space-4); font-size: clamp(22px, 2.2vw, 32px); font-weight: 500; letter-spacing: -.025em; line-height: 1.08; }
.case-overview-grid p { max-width: 42ch; margin: 0; color: var(--ink-soft); line-height: 1.55; }
.case-overview-grid article:first-child p { color: var(--cobalt-contrast); }
.case-overview-grid article:last-child p { color: var(--coral-contrast); }
.case-overview-actions { display: flex; flex-wrap: wrap; gap: var(--lh-space-3); margin-top: var(--lh-space-6); }
.case-overview-actions a { display: inline-flex; align-items: center; min-height: 48px; padding: 12px 18px; background: var(--ink); color: #fff; font-weight: 600; text-decoration: none; }
.case-overview-actions a + a { background: var(--paper-bright); color: var(--ink); }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--lh-space-5); }

.hero-evidence { position: absolute; z-index: 2; width: min(250px, 18vw); padding: 18px; background: var(--paper-bright); color: var(--ink); box-shadow: 0 10px 30px rgba(70, 18, 13, .16); transform: rotate(-1.5deg); }
.hero-evidence span { font-family: var(--font-mono); color: var(--coral); font-size: 10px; font-weight: 500; letter-spacing: .06em; }
.hero-evidence p { margin: 12px 0 0; font-family: var(--font-mono); font-size: clamp(11px, .9vw, 13px); line-height: 1.45; }
.hero-evidence-product { top: 52%; right: 3.5%; width: 220px; transform: rotate(1.5deg); }
.hero-evidence-policy { left: 3%; bottom: 210px; width: 200px; }

.foundation-hero { background-color: var(--cobalt); background-image: url("../../public/assets/images/data-routes-texture-v1.jpg"); background-position: center; background-size: min(1100px, 100vw) auto; background-blend-mode: soft-light; }
.foundation-hero .hero-lead { color: #e1f0fa; }
.foundation-hero .hero-map > p, .foundation-hero .hero-map li { color: #e1f0fa; }
.foundation-evidence { top: 48%; right: 3.5%; width: 230px; transform: rotate(1.25deg); }
.foundation-evidence span { color: var(--cobalt); }
.foundation-goal {
  grid-column: 1 / -1;
  align-self: end;
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(220px, .55fr) minmax(220px, .55fr);
  gap: var(--lh-space-2);
  margin: var(--lh-space-20) calc(var(--page-pad) * -1) 0;
  padding: var(--lh-space-2) var(--page-pad);
  background: #fff;
  color: var(--ink);
}
.foundation-goal > * { display: grid; grid-template-columns: 28px 1fr; gap: 3px var(--lh-space-4); margin: 0; padding: var(--lh-space-5); background: var(--paper-bright); }
.foundation-goal svg { grid-row: 1 / 3; width: 24px; height: 24px; color: var(--cobalt); }
.foundation-goal span { display: block; color: var(--ink-soft); font-family: var(--font-mono); font-size: 10px; letter-spacing: .06em; text-transform: uppercase; }
.foundation-goal strong { display: block; margin-top: var(--lh-space-2); font-size: 16px; font-weight: 600; }

.gtm-brief-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: var(--lh-space-3); }
.gtm-brief-grid article { padding: var(--lh-space-8); background: var(--paper-bright); }
.gtm-brief-grid .gtm-primary { grid-row: span 2; min-height: 520px; padding: clamp(32px, 5vw, 72px); background: var(--coral); color: #fff; }
.gtm-brief-grid article > span { font-family: var(--font-mono); color: var(--coral); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; }
.gtm-brief-grid .gtm-primary > span { color: #f6d8d4; }
.gtm-brief-grid article > svg { width: 24px; height: 24px; margin-bottom: var(--lh-space-8); color: var(--coral); }
.gtm-brief-grid .gtm-primary > svg { width: 32px; height: 32px; margin-bottom: clamp(72px, 10vw, 140px); color: currentColor; }
.gtm-brief-grid h3 { max-width: 18ch; margin: var(--lh-space-10) 0 var(--lh-space-4); font-size: clamp(26px, 3vw, 44px); font-weight: 500; letter-spacing: -.025em; line-height: 1.08; }
.gtm-brief-grid article:not(.gtm-primary) h3 { margin-top: var(--lh-space-8); font-size: clamp(23px, 2.2vw, 32px); }
.gtm-brief-grid p { max-width: 52ch; margin: 0; color: var(--ink-soft); }
.gtm-brief-grid .gtm-primary p { color: #f6d8d4; }

.audience-section {
  width: 100%;
  max-width: none;
  padding-bottom: clamp(80px, 10vw, 144px);
  background: var(--charcoal);
  color: #fff;
}
.audience-section > * { width: min(100%, calc(var(--content-max) - (var(--page-pad) * 2))); margin-inline: auto; }
.audience-section .section-heading > p { color: #c8c6bf; }
.audience-layout { display: grid; grid-template-columns: minmax(260px, .65fr) minmax(0, 1.35fr); gap: var(--lh-space-3); }
.audience-tabs { display: grid; gap: var(--lh-space-2); align-content: start; }
.audience-tabs button { display: grid; gap: var(--lh-space-2); width: 100%; min-height: 112px; padding: var(--lh-space-5); border: 0; background: rgba(255,255,255,.055); color: #fff; text-align: left; cursor: pointer; transition: background-color 180ms ease, color 180ms ease; }
.audience-tabs button[aria-selected="true"] { background: #fff; color: var(--ink); }
.audience-tabs span { color: #c8c6bf; font-family: var(--font-mono); font-size: 10px; letter-spacing: .06em; text-transform: uppercase; }
.audience-tabs button[aria-selected="true"] span { color: var(--coral); }
.audience-tabs strong { align-self: end; font-size: 17px; font-weight: 500; }
.audience-panel { padding: clamp(32px, 5vw, 72px); background: var(--cobalt); color: #fff; }
.audience-panel > svg { width: 38px; height: 38px; margin-top: clamp(56px, 8vw, 120px); }
.audience-meta { display: flex; justify-content: space-between; gap: var(--lh-space-4); color: #e1f0fa; font-family: var(--font-mono); font-size: 10px; letter-spacing: .05em; text-transform: uppercase; }
.audience-panel h3 { max-width: 14ch; margin: var(--lh-space-6) 0 var(--lh-space-4); font-size: clamp(34px, 4.5vw, 68px); font-weight: 500; letter-spacing: -.035em; line-height: 1.02; }
.audience-panel > p { max-width: 62ch; margin: 0; color: #e1f0fa; font-size: 17px; line-height: 1.65; }
.audience-panel dl { display: grid; gap: var(--lh-space-2); margin: var(--lh-space-12) 0 0; }
.audience-panel dl div { display: grid; grid-template-columns: 150px 1fr; gap: var(--lh-space-5); padding: var(--lh-space-4); background: rgba(255,255,255,.09); }
.audience-panel dt { color: #e1f0fa; font-size: 12px; }
.audience-panel dd { margin: 0; font-size: 14px; }
.audience-caveat { display: flex; gap: var(--lh-space-3); max-width: 76ch; margin: var(--lh-space-6) 0 0; color: #c8c6bf; font-size: 13px; }
.audience-caveat svg { flex: 0 0 auto; width: 18px; height: 18px; color: var(--amber-bright); }

.conversion-layout { display: grid; grid-template-columns: minmax(280px, .7fr) minmax(0, 1.3fr); gap: var(--lh-space-3); }
.conversion-steps { display: grid; gap: var(--lh-space-2); align-content: start; }
.conversion-steps button { display: grid; grid-template-columns: 32px 28px 1fr; gap: var(--lh-space-3); align-items: center; min-height: 82px; padding: var(--lh-space-4); border: 0; background: var(--paper-bright); text-align: left; cursor: pointer; transition: background-color 180ms ease, color 180ms ease; }
.conversion-steps button[aria-selected="true"] { background: var(--ink); color: #fff; }
.conversion-steps button > span { font-family: var(--font-mono); font-size: 10px; }
.conversion-steps button > svg { width: 20px; height: 20px; }
.conversion-steps button > strong { font-size: 15px; font-weight: 500; }
.conversion-panel { display: flex; flex-direction: column; min-height: 520px; padding: clamp(32px, 5vw, 72px); background: var(--coral); color: #fff; }
.conversion-meta { display: flex; justify-content: space-between; gap: var(--lh-space-4); color: #f6d8d4; font-family: var(--font-mono); font-size: 10px; letter-spacing: .05em; text-transform: uppercase; }
.conversion-panel h3 { max-width: 14ch; margin: clamp(72px, 10vw, 144px) 0 var(--lh-space-5); font-size: clamp(36px, 5vw, 72px); font-weight: 500; letter-spacing: -.035em; line-height: 1.02; }
.conversion-panel > p { max-width: 58ch; margin: 0; color: #f6d8d4; line-height: 1.65; }
.conversion-check { margin-top: auto; padding: var(--lh-space-5); background: rgba(255,255,255,.1); }
.conversion-check span { display: block; margin-bottom: var(--lh-space-2); color: #f6d8d4; font-family: var(--font-mono); font-size: 10px; letter-spacing: .05em; text-transform: uppercase; }
.conversion-check strong { display: block; max-width: 54ch; font-size: 15px; font-weight: 500; }
.gtm-sources { padding-bottom: 0; }
.gtm-sources a { background: var(--paper-bright); }

.foundation-result {
  width: 100%;
  max-width: none;
  padding-top: var(--lh-space-10);
  padding-bottom: clamp(88px, 11vw, 176px);
  background: var(--ink);
  color: #fff;
}
.foundation-result > * { width: min(100%, calc(var(--content-max) - (var(--page-pad) * 2))); margin-inline: auto; }
.foundation-result .decision-index { border-color: rgba(255,255,255,.38); }
.foundation-result-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: clamp(48px, 9vw, 140px); padding-top: var(--lh-space-16); }
.foundation-result-grid h2 { max-width: 13ch; margin: 0; font-size: clamp(46px, 6.7vw, 96px); font-weight: 500; letter-spacing: -.04em; line-height: .98; text-wrap: balance; }
.foundation-result-grid > div { align-self: end; }
.foundation-result-grid p { max-width: 48ch; margin: 0; color: #c8c6bf; line-height: 1.65; }
.foundation-result-grid blockquote { margin: var(--lh-space-12) 0; font-size: clamp(25px, 2.6vw, 38px); font-weight: 500; letter-spacing: -.025em; line-height: 1.12; }
.foundation-result-grid .decision-caveat { font-size: 13px; }
.measurement-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--lh-space-2); margin-top: var(--lh-space-16); }
.measurement-strip div { min-height: 132px; padding: var(--lh-space-5); background: rgba(255,255,255,.07); }
.measurement-strip dt { color: #c8c6bf; font-family: var(--font-mono); font-size: 10px; letter-spacing: .05em; text-transform: uppercase; }
.measurement-strip dd { margin: var(--lh-space-6) 0 0; font-size: 15px; }
.foundation-next { display: inline-grid; grid-template-columns: minmax(0, 1fr) auto; gap: var(--lh-space-2); align-items: center; min-height: 44px; max-width: 100%; margin-top: var(--lh-space-12); font-weight: 600; line-height: 1.35; }
.foundation-next span { display: inline-block; }
.product-hero { min-height: 100svh; }

.section { padding-top: var(--section-gap); }
.section-heading { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(280px, .7fr); gap: clamp(40px, 8vw, 140px); align-items: end; padding-bottom: var(--lh-space-8); }
.section-heading h2 { max-width: 17ch; margin: 0; font-size: clamp(38px, 5vw, 72px); font-weight: 500; letter-spacing: -.035em; line-height: 1.02; text-wrap: balance; }
.section-heading > p { max-width: 58ch; margin: 0; color: var(--ink-soft); font-size: 17px; line-height: 1.65; text-wrap: pretty; }

.tension-comparison { display: grid; grid-template-columns: 1fr .72fr 1fr; gap: var(--lh-space-3); min-height: 440px; }
.tension-comparison article { padding: var(--lh-space-8); background: var(--paper-bright); }
.tension-comparison article:last-child { padding-inline: var(--lh-space-8); }
.comparison-key { display: block; margin-bottom: var(--lh-space-16); font-family: var(--font-mono); color: var(--coral); font-size: 12px; }
.tension-comparison h3 { max-width: 13ch; margin: 0 0 18px; font-size: clamp(28px, 3vw, 44px); font-weight: 500; letter-spacing: -.025em; line-height: 1.08; }
.tension-comparison article > p { max-width: 40ch; min-height: 72px; color: var(--ink-soft); }
.tension-comparison dl { margin: 36px 0 0; }
.tension-comparison dl div { display: grid; grid-template-columns: 130px 1fr; gap: 16px; padding: 12px 0; border-top: 1px solid var(--line); font-size: 13px; }
.tension-comparison dt { color: var(--ink-soft); }
.tension-comparison dd { margin: 0; }
.comparison-bridge { display: flex; flex-direction: column; justify-content: center; padding: 40px; background: var(--coral); color: #fff; }
.comparison-bridge span { margin-bottom: auto; font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.comparison-bridge strong { font-size: clamp(24px, 2.4vw, 36px); font-weight: 500; letter-spacing: -.025em; line-height: 1.08; }
.commentary-note { display: grid; grid-template-columns: 180px minmax(0, 740px); gap: 28px; padding: 28px 0; }
.commentary-note span { font-family: var(--font-mono); color: var(--coral); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.commentary-note p { margin: 0; color: var(--ink-soft); }

.split-heading { align-items: start; }
.method-track { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--lh-space-3); margin: 0; padding: 0; }
.method-track li { min-height: 240px; padding: var(--lh-space-6); background: rgba(255,255,255,.045); }
.method-track li + li { padding-left: var(--lh-space-6); }
.method-track span { font-family: var(--font-mono); color: var(--coral); font-size: 12px; }
.method-track strong { display: block; margin: var(--lh-space-12) 0 var(--lh-space-2); font-size: 20px; font-weight: 600; }
.method-track p { margin: 0; color: var(--ink-soft); font-size: 14px; }
.source-strip { display: grid; grid-template-columns: minmax(220px, .55fr) 1.45fr; gap: 56px; padding: 40px 0; }
.source-strip > p { max-width: 34ch; margin: 0; font-size: 20px; line-height: 1.35; }
.source-strip > div { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; }
.source-strip a { display: grid; grid-template-columns: minmax(86px, max-content) minmax(0, 1fr); align-items: start; gap: var(--lh-space-4); margin-bottom: var(--lh-space-1); padding: 12px; background: rgba(255,255,255,.045); font-family: var(--font-mono); font-size: 11px; text-align: left; text-decoration: none; }
.source-strip a span { min-width: 0; color: var(--ink-soft); font-family: var(--font-sans); text-align: left; }

.method-section { width: 100%; max-width: none; padding-bottom: clamp(80px, 10vw, 144px); background: var(--charcoal); color: #fff; }
.method-section > * { width: min(100%, calc(var(--content-max) - (var(--page-pad) * 2))); margin-inline: auto; }
.method-section .section-heading, .method-section .method-track, .method-section .method-track li, .method-section .source-strip a { border-color: #60605b; }
.method-section .section-heading > p, .method-section .method-track p, .method-section .source-strip a span { color: #c8c6bf; }
.method-section .method-track span { color: #ff8276; }

.lifecycle-section { padding-bottom: var(--section-gap); }
.project-stages { display: grid; gap: var(--lh-space-2); }
.project-stage { background: var(--paper-bright); }
.project-stage summary { display: grid; grid-template-columns: 52px minmax(0, 1fr) auto 24px; gap: var(--lh-space-5); align-items: center; min-height: 94px; padding: var(--lh-space-5) var(--lh-space-6); cursor: pointer; list-style: none; }
.project-stage summary::-webkit-details-marker { display: none; }
.project-stage summary > svg { width: 20px; height: 20px; transition: transform 180ms var(--ease-out); }
.project-stage[open] { background: var(--cobalt); color: #fff; }
.project-stage[open] summary > svg { transform: rotate(180deg); }
.stage-number { align-self: start; padding-top: 2px; font-family: var(--font-mono); font-size: 12px; }
.stage-name { display: grid; gap: var(--lh-space-1); }
.stage-name small { color: var(--ink-soft); font-family: var(--font-mono); font-size: 10px; letter-spacing: .05em; text-transform: uppercase; }
.stage-name strong { font-size: 18px; font-weight: 500; }
.stage-state { padding: 5px 8px; background: #ebe8e1; color: var(--ink-soft); font-family: var(--font-mono); font-size: 10px; text-transform: uppercase; }
.stage-state.is-complete { color: var(--mint); }
.stage-state.is-next { color: var(--coral); }
.project-stage[open] .stage-name small { color: #e1f0fa; }
.project-stage[open] .stage-state { background: rgba(255,255,255,.12); color: #fff; }
.stage-body { display: grid; grid-template-columns: minmax(260px, .8fr) minmax(0, 1.2fr); gap: clamp(40px, 8vw, 120px); padding: var(--lh-space-4) var(--lh-space-6) var(--lh-space-8) calc(52px + var(--lh-space-6)); }
.stage-body h3 { max-width: 16ch; margin: 0; font-size: clamp(28px, 3.5vw, 50px); font-weight: 500; letter-spacing: -.03em; line-height: 1.05; }
.stage-body dl { display: grid; gap: var(--lh-space-2); margin: 0; }
.stage-body dl div { display: grid; grid-template-columns: 108px 1fr; gap: var(--lh-space-5); padding: var(--lh-space-4); background: rgba(255,255,255,.1); }
.stage-body dt { color: #e1f0fa; font-size: 12px; }
.stage-body dd { margin: 0; font-size: 14px; }
.stage-body a { display: inline-flex; align-items: center; min-height: 44px; }

.anatomy-layout { display: grid; grid-template-columns: minmax(320px, .7fr) 1.3fr; gap: var(--lh-space-4); min-height: 620px; }
.anatomy-tabs { display: flex; flex-direction: column; gap: var(--lh-space-2); }
.anatomy-tabs button { display: grid; grid-template-columns: 44px 1fr; gap: 2px var(--lh-space-4); align-items: start; width: 100%; padding: var(--lh-space-5); border: 0; background: var(--paper-bright); text-align: left; cursor: pointer; transition: color 180ms ease, background-color 180ms ease; }
.anatomy-tabs button[aria-selected="true"] { background: var(--coral-soft); color: var(--coral); }
.anatomy-tabs button[aria-selected="true"] { color: var(--coral); }
.anatomy-tabs button span { grid-row: 1 / 3; font-family: var(--font-mono); font-size: 11px; }
.anatomy-tabs button strong { font-size: 18px; font-weight: 600; }
.anatomy-tabs button small { color: var(--ink-soft); font-size: 12px; }
.layer-panel { padding: clamp(36px, 5vw, 76px); background: var(--paper-bright); }
.layer-meta { display: flex; justify-content: space-between; gap: 20px; font-family: var(--font-mono); color: var(--ink-soft); font-size: 11px; letter-spacing: .04em; text-transform: uppercase; }
.layer-panel h3 { max-width: 15ch; margin: 88px 0 24px; font-size: clamp(34px, 4.2vw, 64px); font-weight: 500; letter-spacing: -.035em; line-height: 1.02; }
.layer-panel > p { max-width: 60ch; margin: 0; color: var(--ink-soft); font-size: 17px; line-height: 1.65; }
.message-specimen { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--lh-space-2); margin-top: var(--lh-space-12); }
.message-specimen p { display: flex; flex-direction: column; gap: var(--lh-space-4); min-height: 132px; margin: 0; padding: var(--lh-space-5); background: #fff; }
.message-specimen span { color: var(--ink-soft); font-size: 12px; }
.message-specimen strong { font-size: 13px; font-weight: 600; }

.path-switch, .evidence-filters { display: flex; gap: 6px; padding: 28px 0; }
.path-switch button, .evidence-filters button { min-height: 44px; padding: 9px 14px; border: 1px solid var(--line-strong); border-radius: 999px; background: transparent; cursor: pointer; font-size: 13px; }
.path-switch button.is-active, .evidence-filters button.is-active { border-color: var(--ink); background: var(--ink); color: var(--paper); }
.path-canvas { display: grid; grid-template-columns: .55fr 1.45fr; gap: 52px; padding: clamp(36px, 5vw, 72px); background: var(--ink); color: var(--paper-bright); }
.path-title span { display: block; font-family: var(--font-mono); color: #ff8472; font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.path-title strong { display: block; max-width: 14ch; margin-top: 80px; font-size: clamp(28px, 3vw, 44px); font-weight: 500; letter-spacing: -.03em; line-height: 1.08; }
.path-canvas ol { display: grid; gap: var(--lh-space-2); list-style: none; margin: 0; padding: 0; }
.path-canvas li { display: grid; grid-template-columns: 64px 1fr; gap: var(--lh-space-6); padding: var(--lh-space-5); background: rgba(255,255,255,.08); }
.path-canvas li span { font-family: var(--font-mono); color: #ff8472; font-size: 11px; }
.path-canvas li p { max-width: 54ch; margin: 0; color: #d4d1c8; }
.path-foot { grid-column: 2; margin: 0; color: #a9a69d; font-size: 13px; }

.paths-section { width: 100%; max-width: none; padding-bottom: clamp(88px, 10vw, 144px); background: var(--cobalt); color: #fff; }
.paths-section > * { width: min(100%, calc(var(--content-max) - (var(--page-pad) * 2))); margin-inline: auto; }
.paths-section .section-heading { border-color: rgba(255,255,255,.5); }
.paths-section .section-heading > p { color: #e1f0fa; }
.paths-section .path-switch button { border-color: rgba(255,255,255,.65); color: #fff; }
.paths-section .path-switch button.is-active { background: #fff; color: var(--cobalt); }
.paths-section .path-canvas { padding-inline: 0; background: transparent; }
.paths-section .path-canvas li p { color: #e1f0fa; }
.paths-section .path-title span { color: #fff; }
.paths-section .path-canvas li span { color: #fff; }
.paths-section .path-foot { color: #e1f0fa; }

.evidence-table { display: grid; gap: var(--lh-space-2); }
.evidence-row { display: grid; grid-template-columns: 130px .75fr 1.5fr 140px; gap: var(--lh-space-6); align-items: center; min-height: 92px; padding: var(--lh-space-5); background: var(--paper-bright); transition: opacity 180ms ease; }
.evidence-row[hidden] { display: none; }
.evidence-row > span:first-child, .evidence-head { font-family: var(--font-mono); font-size: 11px; }
.evidence-row strong { font-size: 15px; font-weight: 600; }
.evidence-row p { margin: 0; color: var(--ink-soft); font-size: 14px; }
.evidence-head { min-height: auto; padding-block: var(--lh-space-2); background: transparent; color: var(--ink-soft); text-transform: uppercase; letter-spacing: .06em; }
.status { display: inline-flex; align-items: center; gap: 6px; justify-self: start; font-family: var(--font-mono); font-size: 10px; text-transform: uppercase; }
.status svg { width: 16px; height: 16px; flex: 0 0 auto; }
.status.verified { color: var(--mint); }
.status.hypothesis { color: var(--amber); }
.status.constraint { color: var(--red); }
.empty-filter { padding: 40px 0; color: var(--ink-soft); }

.claim-list { display: grid; gap: var(--lh-space-2); }
.claim-list details { background: rgba(255,255,255,.045); }
.claim-list summary { display: grid; grid-template-columns: 24px 1fr auto; gap: var(--lh-space-4); align-items: center; padding: var(--lh-space-5); cursor: pointer; list-style: none; }
.claim-list summary::-webkit-details-marker { display: none; }
.claim-list summary strong { font-size: clamp(20px, 2vw, 28px); font-weight: 500; }
.claim-list summary > span:last-child { color: var(--ink-soft); font-size: 13px; }
.claim-dot { display: inline-flex; width: 20px; height: 20px; background: transparent; }
.claim-dot svg { width: 20px; height: 20px; }
.claim-dot.safe { color: var(--mint); }
.claim-dot.test { color: var(--amber); }
.claim-dot.stop { color: var(--red); }
.claim-list ul { margin: 0; padding: 0 var(--lh-space-5) var(--lh-space-5) 60px; list-style: none; }
.claim-list li { position: relative; max-width: 80ch; padding: 7px 0 7px 24px; color: var(--ink-soft); }
.claim-list li::before { content: "—"; position: absolute; left: 0; color: var(--ink); }

.claims-section { width: 100%; max-width: none; padding-bottom: clamp(88px, 10vw, 144px); background: var(--charcoal); color: #fff; }
.claims-section > * { width: min(100%, calc(var(--content-max) - (var(--page-pad) * 2))); margin-inline: auto; }
.claims-section .section-heading, .claims-section .claim-list, .claims-section .claim-list details { border-color: #60605b; }
.claims-section .section-heading > p, .claims-section .claim-list li, .claims-section .claim-list summary > span:last-child { color: #c8c6bf; }
.claims-section .claim-list li::before { color: #fff; }

/* Shared disclosure system: one construct, one interaction model. */
.info-accordion { width: 100%; }
.info-accordion .project-stage { color: var(--ink); }
.info-accordion .stage-number { display: grid; place-items: center; align-self: center; width: 32px; min-height: 32px; padding: 0; }
.info-accordion .stage-number svg { width: 20px; height: 20px; }
.info-accordion .stage-body > div > p { max-width: 58ch; margin: var(--lh-space-4) 0 0; color: inherit; line-height: 1.6; }
.info-accordion .stage-body h3 { max-width: 19ch; }
.accordion-paper .project-stage[open] { background: var(--cobalt); color: #fff; }
.accordion-paper .project-stage[open] .stage-body dl div { background: transparent; color: var(--ink); }
.accordion-paper .project-stage[open] .stage-body dt { color: var(--cobalt); }
.accordion-paper .project-stage[open] .stage-body dd { color: var(--ink); }
.accordion-dark .project-stage,
.accordion-inverse .project-stage { background: rgba(255,255,255,.065); color: #fff; }
.accordion-dark .project-stage[open],
.accordion-inverse .project-stage[open] { background: var(--paper-bright); color: var(--ink); }
.accordion-dark .project-stage:not([open]) .stage-name small,
.accordion-inverse .project-stage:not([open]) .stage-name small { color: #c8c6bf; }
.accordion-dark .project-stage:not([open]) .stage-state,
.accordion-inverse .project-stage:not([open]) .stage-state { background: rgba(255,255,255,.1); color: #fff; }
.accordion-dark .project-stage[open] .stage-name small,
.accordion-inverse .project-stage[open] .stage-name small { color: var(--ink-soft); }
.accordion-dark .project-stage[open] .stage-state,
.accordion-inverse .project-stage[open] .stage-state { background: #e7e3da; color: var(--ink-soft); }
.accordion-dark .project-stage[open] .stage-body > div > p,
.accordion-inverse .project-stage[open] .stage-body > div > p { color: var(--ink-soft); }
.accordion-dark .project-stage[open] .stage-body dl div,
.accordion-inverse .project-stage[open] .stage-body dl div { background: transparent; }
.accordion-dark .project-stage[open] .stage-body dt,
.accordion-inverse .project-stage[open] .stage-body dt { color: var(--cobalt); }
.accordion-steps { display: grid; gap: var(--lh-space-2); margin: 0; padding: 0; list-style: none; }
.accordion-steps li { display: grid; grid-template-columns: 40px minmax(0, 1fr); gap: var(--lh-space-4); padding: var(--lh-space-4); background: #fff; color: var(--ink); }
.accordion-steps span { color: var(--cobalt); font-family: var(--font-mono); font-size: 11px; }
.claim-list details { background: rgba(255,255,255,.065); }
.claim-list .project-stage summary { grid-template-columns: 52px minmax(0, 1fr) auto 24px; gap: var(--lh-space-5); min-height: 94px; padding: var(--lh-space-5) var(--lh-space-6); }
.claim-list .project-stage summary > span:last-of-type { color: inherit; font-size: 10px; }
.claim-list .project-stage[open] .claim-dot.safe { color: var(--mint); }
.claim-list .project-stage[open] .claim-dot.test { color: var(--amber); }
.claim-list .project-stage[open] .claim-dot.stop { color: var(--red); }
.claim-list ul { padding: 0 var(--lh-space-6) var(--lh-space-6) calc(52px + var(--lh-space-6)); }
.claim-list .project-stage[open] li { color: var(--ink-soft); }
.claim-list .project-stage[open] li::before { color: var(--ink); }

.decision-section { width: 100%; max-width: none; margin-top: 0; padding-top: 40px; padding-bottom: clamp(88px, 11vw, 176px); background: var(--coral); color: #fff; }
.decision-section > * { width: min(100%, calc(var(--content-max) - (var(--page-pad) * 2))); margin-inline: auto; }
.decision-index { padding-bottom: 40px; border-bottom: 0; font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.decision-index span { padding-inline: 10px; }
.decision-grid { display: grid; grid-template-columns: 1.4fr .6fr; gap: clamp(48px, 9vw, 140px); padding-top: 64px; }
.decision-grid h2 { max-width: 12ch; margin: 0; font-size: clamp(46px, 6.8vw, 100px); font-weight: 500; letter-spacing: -.04em; line-height: .98; text-wrap: balance; }
.decision-copy { align-self: end; }
.decision-copy > p { max-width: 46ch; margin: 0 0 32px; line-height: 1.65; }
.decision-copy blockquote { margin: 48px 0; padding-top: 0; border-top: 0; font-size: clamp(26px, 2.7vw, 40px); font-weight: 500; letter-spacing: -.025em; line-height: 1.1; }
.decision-copy .decision-caveat { margin-bottom: 0; color: #ffe2dc; font-size: 13px; }

.next-section { display: grid; grid-template-columns: 1fr 1fr auto; gap: clamp(32px, 6vw, 96px); align-items: end; padding-top: 72px; padding-bottom: 72px; }
.next-section > div > p { margin: 0 0 14px; color: var(--ink-soft); font-size: 13px; }
.next-section h2 { margin: 0; font-size: clamp(28px, 3vw, 44px); font-weight: 500; letter-spacing: -.025em; }
.next-section > p { max-width: 54ch; margin: 0; color: var(--ink-soft); }
.next-status { display: inline-flex; align-items: center; min-height: 44px; padding: 8px 12px; background: var(--paper-bright); font-family: var(--font-mono); font-size: 11px; text-decoration: none; text-transform: uppercase; }

.site-footer { display: flex; justify-content: space-between; gap: 24px; padding-top: 28px; padding-bottom: 28px; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: 12px; }
.site-footer p { margin: 0; }
.site-footer a { display: inline-flex; align-items: center; min-height: 44px; }

@media (max-width: 1080px) {
  .site-header { grid-template-columns: 1fr auto; }
  .primary-nav { display: none; }
  .hero { grid-template-columns: 88px minmax(0, 1fr); }
  .hero-map { display: none; }
  .tension-tool { grid-column: 1 / -1; }
  .section-heading { grid-template-columns: 1.25fr .75fr; gap: 56px; }
  .method-track { grid-template-columns: repeat(2, 1fr); }
  .method-track li:nth-child(2) { border-right: 0; }
  .anatomy-layout { grid-template-columns: 280px 1fr; }
  .message-specimen { grid-template-columns: 1fr; }
  .message-specimen p { min-height: auto; }
  .evidence-row { grid-template-columns: 110px .8fr 1.5fr 90px; }
  .decision-grid { grid-template-columns: 1fr; }
  .foundation-result-grid { grid-template-columns: 1fr; }
  .case-overview-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .decision-copy { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
  .decision-copy blockquote { margin-top: 0; }
  .decision-copy .decision-caveat { grid-column: 2; }
}

@media (max-width: 900px) {
  :root { --section-gap: var(--lh-space-section-mobile); }
  html { scroll-padding-top: 72px; }
  .site-header { min-height: 64px; }
  .brand { font-size: 14px; }
  .map-button svg { width: 18px; }
  .header-actions { gap: var(--lh-space-2); }
  .language-switch a { min-width: 44px; min-height: 44px; padding-inline: 6px; }
  .hero { display: block; min-height: auto; padding-top: var(--lh-space-10); padding-bottom: var(--lh-space-8); }
  .hero-index { flex-direction: row; align-items: baseline; gap: var(--lh-space-2); margin-bottom: var(--lh-space-8); padding: 0; }
  .hero-index::before { width: 48px; height: 1px; margin: 0 6px 3px 0; }
  .hero-index strong { font-size: 16px; }
  .hero-copy :is(h1, h2) { max-width: 11ch; font-size: clamp(44px, 12.8vw, 68px); line-height: .94; hyphens: none; }
  html[lang="ru"] .hero-copy :is(h1, h2),
  html[lang="ru"] .chapter-hero h1 { max-width: none; font-size: clamp(32px, 9vw, 56px); }
  .hero-lead { margin-top: var(--lh-space-6); }
  .hero-evidence { position: relative; inset: auto; width: min(250px, 78vw); margin: var(--lh-space-10) 0 0 auto; transform: rotate(1.5deg); }
  .hero-evidence-policy { display: none; }
  .foundation-goal { grid-template-columns: 1fr; margin: var(--lh-space-12) calc(var(--page-pad) * -1) calc(var(--lh-space-8) * -1); padding: var(--lh-space-2) var(--page-pad); }
  .foundation-goal > * { padding: var(--lh-space-4); }
  .tension-tool { padding: var(--lh-space-5); }
  .tension-head { display: block; }
  .tension-head output { display: block; margin-top: 6px; }
  .range-labels { gap: 20px; font-size: 11px; line-height: 1.3; }
  .range-labels span { max-width: 46%; }
  .range-labels span:last-child { text-align: right; }
  .section-heading { display: block; padding-bottom: var(--lh-space-6); }
  .section-heading h2 { max-width: 100%; font-size: clamp(32px, 10vw, 54px); }
  .section-heading > p { margin-top: var(--lh-space-5); font-size: 16px; }
  .tension-comparison { display: grid; grid-template-columns: 1fr; gap: var(--lh-space-3); }
  .tension-comparison article, .tension-comparison article:last-child { padding: var(--lh-space-6); }
  .comparison-key { margin-bottom: var(--lh-space-8); }
  .tension-comparison article > p { min-height: auto; }
  .comparison-bridge { min-height: 220px; padding: var(--lh-space-6); }
  .commentary-note { grid-template-columns: 1fr; gap: var(--lh-space-2); padding-block: var(--lh-space-6); }
  .gtm-brief-grid { grid-template-columns: 1fr; gap: var(--lh-space-2); }
  .case-overview { padding-top: var(--lh-space-16); }
  .case-overview-grid { grid-template-columns: 1fr; }
  .case-overview-grid article { min-height: auto; }
  .case-overview-grid h3 { margin-top: var(--lh-space-10); }
  .case-overview-actions { display: grid; grid-template-columns: 1fr; }
  .case-overview-actions a { justify-content: center; }
  .gtm-brief-grid .gtm-primary { grid-row: auto; min-height: auto; padding: var(--lh-space-6); }
  .gtm-brief-grid article { padding: var(--lh-space-5); }
  .gtm-brief-grid svg { margin-bottom: var(--lh-space-16); }
  .gtm-brief-grid h3, .gtm-brief-grid article:not(.gtm-primary) h3 { margin-top: var(--lh-space-8); }
  .audience-layout { grid-template-columns: 1fr; gap: var(--lh-space-3); }
  .audience-tabs { grid-template-columns: 1fr; }
  .audience-tabs button { min-height: 92px; padding: var(--lh-space-4); }
  .audience-tabs > .audience-panel { margin: 0 0 var(--lh-space-2); }
  .audience-panel { padding: var(--lh-space-6); }
  .audience-panel > svg { margin-top: var(--lh-space-12); }
  .audience-panel h3 { max-width: none; font-size: clamp(30px, 10vw, 54px); }
  .audience-panel dl div { grid-template-columns: 1fr; gap: var(--lh-space-2); }
  .conversion-layout { grid-template-columns: 1fr; gap: var(--lh-space-3); }
  .conversion-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .conversion-steps button { grid-template-columns: 28px 24px 1fr; min-height: 88px; padding: var(--lh-space-4); }
  .conversion-steps > .conversion-panel { grid-column: 1 / -1; margin: 0 0 var(--lh-space-2); }
  .conversion-panel { min-height: auto; padding: var(--lh-space-6); }
  .conversion-panel h3 { margin-top: var(--lh-space-16); font-size: clamp(30px, 10vw, 54px); }
  .conversion-check { margin-top: var(--lh-space-12); }
  .foundation-result { padding-top: var(--lh-space-8); }
  .foundation-result-grid { grid-template-columns: 1fr; gap: var(--lh-space-10); padding-top: var(--lh-space-10); }
  .foundation-result-grid h2 { max-width: none; font-size: clamp(34px, 10vw, 68px); }
  .measurement-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: var(--lh-space-12); }
  .measurement-strip div { min-height: 112px; padding: var(--lh-space-4); }
  .method-track { grid-template-columns: 1fr; gap: var(--lh-space-2); }
  .method-track li, .method-track li + li { min-height: auto; padding: var(--lh-space-5); border-right: 0; }
  .method-track strong { margin-top: var(--lh-space-8); }
  .source-strip { grid-template-columns: 1fr; gap: var(--lh-space-6); padding-block: var(--lh-space-8); }
  .source-strip > div { grid-template-columns: 1fr; }
  .anatomy-layout { display: grid; grid-template-columns: 1fr; gap: var(--lh-space-3); min-height: auto; }
  .project-stage summary { grid-template-columns: 42px minmax(0, 1fr) auto 20px; gap: var(--lh-space-4); padding: var(--lh-space-4); }
  .stage-body { grid-template-columns: 1fr; gap: var(--lh-space-6); padding: var(--lh-space-3) var(--lh-space-4) var(--lh-space-6) calc(42px + var(--lh-space-8)); }
  .stage-body h3 { max-width: 20ch; }
  .anatomy-tabs button { grid-template-columns: 38px 1fr; padding: var(--lh-space-4); }
  .anatomy-tabs > .layer-panel { margin: 0 0 var(--lh-space-2); }
  .layer-panel { min-height: auto; margin-inline: 0; padding: var(--lh-space-6); }
  .layer-panel h3 { margin-top: var(--lh-space-10); }
  .message-specimen { margin-top: var(--lh-space-8); }
  .message-specimen p { min-height: auto; }
  .path-switch { display: grid; grid-template-columns: 1fr; gap: var(--lh-space-2); padding-block: var(--lh-space-6); }
  .evidence-filters { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--lh-space-2); padding-block: var(--lh-space-6); }
  .path-switch button, .evidence-filters button { width: 100%; min-width: 0; }
  .path-switch > .path-canvas { margin: 0 0 var(--lh-space-2); }
  .path-canvas { grid-template-columns: 1fr; margin-inline: 0; padding: var(--lh-space-6) 0; }
  .path-title strong { margin-top: var(--lh-space-8); }
  .path-canvas li { grid-template-columns: 40px 1fr; gap: var(--lh-space-4); padding: var(--lh-space-4); }
  .path-foot { grid-column: 1; }
  .evidence-head { display: none; }
  .evidence-row { grid-template-columns: 1fr; gap: var(--lh-space-2); align-items: start; padding: var(--lh-space-5); }
  .evidence-row p, .evidence-row .status { grid-column: 1; }
  .evidence-row .status { margin-top: var(--lh-space-2); }
  .claim-list .project-stage summary { grid-template-columns: 42px minmax(0, 1fr) auto 20px; gap: var(--lh-space-4); padding: var(--lh-space-4); }
  .claim-list ul { padding: 0 var(--lh-space-5) var(--lh-space-6) calc(42px + var(--lh-space-8)); }
  .method-section > *, .paths-section > *, .claims-section > *, .decision-section > *, .audience-section > *, .foundation-result > * { width: 100%; }
  .decision-section { margin-inline: 0; padding-top: 32px; }
  .decision-grid { padding-top: var(--lh-space-8); }
  .decision-grid h2 { max-width: none; font-size: clamp(30px, 9.5vw, 70px); }
  .decision-copy { display: block; }
  .decision-copy blockquote { margin-block: var(--lh-space-8); }
  .next-section { grid-template-columns: 1fr; gap: var(--lh-space-6); align-items: start; padding-block: var(--lh-space-12); }
  .next-status { width: max-content; }
  .site-footer { flex-direction: column; }
}

@media (hover: hover) and (pointer: fine) {
  .primary-nav a:hover { color: var(--ink); }
  .language-switch a:not([aria-current="page"]):hover { background: #ebe8e1; color: var(--ink); }
  .map-button:hover { background: var(--paper-bright); }
  .drawer-head button:hover { background: rgba(255,255,255,.08); color: #fff; }
  .project-stage:not([open]) summary:hover { background: #ebe8e1; }
  .accordion-dark .project-stage:not([open]) summary:hover,
  .accordion-inverse .project-stage:not([open]) summary:hover { background: rgba(255,255,255,.12); }
  .path-switch button:hover, .evidence-filters button:hover { border-color: var(--ink); }
  .paths-section .path-switch button:hover { border-color: #fff; }
  .audience-tabs button:hover { background: rgba(255,255,255,.1); }
  .audience-tabs button[aria-selected="true"]:hover { background: #fff; }
  .conversion-steps button:hover { background: #ebe8e1; }
  .conversion-steps button[aria-selected="true"]:hover { background: var(--ink); }
}

@media (max-width: 560px) {
  html[lang="en"] .hero-copy h1 { max-width: none; font-size: 40px; }
  .chapter-hero h1 { max-width: none; font-size: 40px; line-height: .98; }
  html[lang="ru"] .hero-copy :is(h1, h2),
  html[lang="ru"] .chapter-hero h1 { font-size: 32px; line-height: .96; }
  .conversion-steps { grid-template-columns: 1fr; }
  .measurement-strip { grid-template-columns: 1fr; }
  .measurement-strip div { min-height: auto; }
  .source-strip a { grid-template-columns: 72px minmax(0, 1fr); gap: var(--lh-space-3); }
  .project-stage summary { grid-template-columns: 34px minmax(0, 1fr) 20px; gap: var(--lh-space-3); }
  .project-stage summary > .stage-state { grid-column: 2; justify-self: start; }
  .project-stage summary > svg { grid-column: 3; grid-row: 1 / 3; }
  .stage-name strong { font-size: 16px; }
  .stage-body { padding-left: var(--lh-space-4); }
  .stage-body dl div { grid-template-columns: 1fr; gap: var(--lh-space-2); }
  .claim-list .project-stage summary { grid-template-columns: 34px minmax(0, 1fr) 20px; gap: var(--lh-space-3); }
  .claim-list .project-stage summary > .stage-state { grid-column: 2; justify-self: start; }
  .claim-list .project-stage summary > svg { grid-column: 3; grid-row: 1 / 3; }
  .claim-list ul { padding: 0 var(--lh-space-4) var(--lh-space-6); }
}

/* Stage one-pagers */
.chapter-page .site-header { background: rgba(255,255,255,.94); }
.chapter-hero { position: relative; display: grid; grid-template-columns: 88px minmax(0, 1.2fr) minmax(260px, .55fr); gap: clamp(28px, 5vw, 80px); min-height: min(820px, calc(100vh - 72px)); padding: clamp(48px, 8vw, 120px) var(--page-pad); background-color: var(--cobalt); background-image: url("../../public/assets/images/data-routes-texture-v1.jpg"); background-position: center; background-size: min(1000px, 100vw) auto; background-blend-mode: soft-light; color: #fff; overflow: hidden; }
.chapter-hero .hero-index { position: static; }
.chapter-hero-copy { align-self: center; }
.chapter-hero h1 { max-width: 11ch; margin: 0; font-size: clamp(52px, 8vw, 118px); font-weight: 500; letter-spacing: -.04em; line-height: .94; text-wrap: balance; }
.chapter-hero .hero-lead { max-width: 54ch; margin: var(--lh-space-8) 0 0; color: #e1f0fa; font-size: clamp(18px, 2vw, 24px); line-height: 1.45; }
.chapter-sample { align-self: end; padding: var(--lh-space-6); background: #fff; color: var(--ink); }
.chapter-sample > span { color: var(--cobalt); font-family: var(--font-mono); font-size: 10px; letter-spacing: .06em; text-transform: uppercase; }
.chapter-sample strong { display: block; margin: var(--lh-space-6) 0 var(--lh-space-2); font-size: clamp(44px, 5vw, 72px); font-weight: 500; letter-spacing: -.04em; line-height: 1; }
.chapter-sample p { margin: 0; color: var(--ink-soft); font-size: 14px; }
.sample-ledger { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--lh-space-2); }
.sample-ledger div { min-height: 164px; padding: var(--lh-space-5); background: var(--paper-bright); box-shadow: 0 18px 48px rgba(23,23,20,.055); }
.sample-ledger dt { color: var(--ink-soft); font-family: var(--font-mono); font-size: 10px; text-transform: uppercase; }
.sample-ledger dd { margin: var(--lh-space-10) 0 0; }
.sample-ledger strong { display: block; font-size: 34px; font-weight: 500; letter-spacing: -.03em; }
.sample-ledger span { color: var(--ink-soft); font-size: 13px; }
.signals-section { width: 100%; max-width: none; background: var(--charcoal); color: #fff; }
.signals-section > * { width: min(100%, calc(var(--content-max) - (var(--page-pad) * 2))); margin-inline: auto; }
.signals-section .section-heading > p { color: #c8c6bf; }
.signal-board { display: grid; gap: var(--lh-space-3); }
.signal-row { display: grid; grid-template-columns: minmax(190px, .65fr) minmax(0, 1.35fr) 90px; gap: var(--lh-space-5); align-items: center; min-height: 64px; }
.signal-row strong { font-size: 15px; font-weight: 500; }
.signal-track { height: 12px; background: rgba(255,255,255,.1); }
.signal-track span { display: block; width: var(--value); height: 100%; background: var(--coral-hot); }
.signal-row output { font-family: var(--font-mono); font-size: 12px; text-align: right; }
.signal-note { max-width: 72ch; margin: var(--lh-space-8) 0 0; color: #c8c6bf; font-size: 13px; }
.quote-evidence { margin: var(--lh-space-5) 0 0; padding: var(--lh-space-5); background: rgba(255,255,255,.1); }
.accordion-paper .project-stage[open] .quote-evidence { background: #fff; color: var(--ink); }
.accordion-dark .project-stage[open] .quote-evidence { background: #fff; }
.quote-evidence blockquote { margin: 0; font-size: clamp(19px, 2vw, 26px); line-height: 1.35; }
.quote-evidence p { margin: var(--lh-space-4) 0 0; color: var(--ink-soft); font-family: var(--font-mono); font-size: 10px; }
.comparison-board { display: grid; grid-template-columns: minmax(180px, .7fr) repeat(3, minmax(150px, 1fr)); gap: var(--lh-space-2); }
.comparison-board [role="row"] { display: contents; }
.comparison-board [role="cell"], .comparison-board [role="rowheader"], .comparison-board [role="columnheader"] { padding: var(--lh-space-5); background: var(--paper-bright); }
.comparison-board .comparison-label { background: transparent; padding-left: 0; }
.comparison-board span { display: block; color: var(--ink-soft); font-size: 12px; }
.comparison-board strong { display: block; margin-top: var(--lh-space-6); font-size: 24px; font-weight: 500; }
.comparison-board small { display: block; margin-top: var(--lh-space-2); color: var(--ink-soft); }
.voc-decision { background: var(--coral); color: #fff; }
.voc-decision .decision-caveat { color: #ffe2dc; }
.method-note { max-width: 76ch; margin: var(--lh-space-8) 0 0; color: var(--ink-soft); font-size: 13px; }
.chapter-nav-link { display: inline-flex; align-items: center; min-height: 44px; gap: var(--lh-space-3); margin-top: var(--lh-space-8); font-weight: 600; }

@media (max-width: 900px) {
  .chapter-hero { grid-template-columns: 64px minmax(0, 1fr); min-height: auto; }
  .chapter-sample { grid-column: 2; }
  .sample-ledger { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .comparison-board { grid-template-columns: 1fr 1fr; }
  .comparison-board .comparison-label { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  .chapter-hero { grid-template-columns: 1fr; gap: var(--lh-space-8); padding-top: var(--lh-space-10); }
  .chapter-hero h1 { max-width: none; font-size: 40px; }
  html[lang="ru"] .chapter-hero h1 { font-size: 32px; }
  .chapter-hero .hero-index { display: flex; align-items: baseline; gap: var(--lh-space-3); }
  .chapter-hero .hero-index strong { font-size: 32px; }
  .chapter-sample { grid-column: 1; }
  .sample-ledger, .comparison-board { grid-template-columns: 1fr; }
  .signal-row { grid-template-columns: 1fr auto; gap: var(--lh-space-2) var(--lh-space-4); }
  .signal-track { grid-column: 1 / -1; grid-row: 2; }
  .signal-row output { grid-column: 2; grid-row: 1; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

/* Data-driven research stages 03–10 */
.stage-blue-section { width: 100%; max-width: none; background: var(--cobalt); color: #fff; }
.stage-blue-section > * { width: min(100%, calc(var(--content-max) - (var(--page-pad) * 2))); margin-inline: auto; }
.stage-blue-section .section-heading > p { color: var(--cobalt-contrast); }
.stage-ledger { margin-top: var(--lh-space-2); }
.research-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--lh-space-2); }
.research-grid.is-compact { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.research-card { --research-accent: var(--cobalt); min-width: 0; min-height: 230px; padding: var(--lh-space-6); background: var(--paper-bright); color: var(--ink); box-shadow: 0 22px 60px rgba(23,23,20,.065), 0 3px 12px rgba(23,23,20,.025); }
.research-card.blue { --research-accent: var(--cobalt); }
.research-card.dark { --research-accent: var(--charcoal); }
.research-card.coral { --research-accent: var(--coral); }
.research-card > span { display: inline-flex; align-items: center; gap: var(--lh-space-2); color: var(--research-accent); font-family: var(--font-mono); font-size: 10px; letter-spacing: .06em; text-transform: uppercase; }
.research-card > span::before { content: ""; width: 8px; height: 8px; flex: 0 0 auto; background: currentColor; }
.research-card h3 { max-width: 22ch; margin: var(--lh-space-12) 0 var(--lh-space-4); font-size: clamp(24px, 2.5vw, 38px); font-weight: 500; letter-spacing: -.03em; line-height: 1.08; }
.research-card p { max-width: 58ch; margin: 0; color: var(--ink-soft); line-height: 1.6; }
.research-card small { display: block; margin-top: var(--lh-space-6); font-family: var(--font-mono); line-height: 1.5; }
.process-stack { display: grid; gap: var(--lh-space-2); margin: 0; padding: 0; list-style: none; }
.process-stack li { display: grid; grid-template-columns: 64px minmax(0, 1fr) minmax(120px, .3fr); gap: var(--lh-space-6); align-items: start; padding: var(--lh-space-6); background: var(--paper-bright); box-shadow: 0 18px 48px rgba(23,23,20,.05); }
.process-stack li > span { color: var(--cobalt); font-family: var(--font-mono); font-size: 12px; }
.process-stack h3 { margin: 0 0 var(--lh-space-3); font-size: clamp(20px, 2.2vw, 30px); font-weight: 500; letter-spacing: -.02em; }
.process-stack p { max-width: 66ch; margin: 0; color: var(--ink-soft); line-height: 1.6; }
.process-stack small { color: var(--ink-soft); font-family: var(--font-mono); line-height: 1.5; text-align: right; }
.strategy-matrix { display: grid; gap: 1px; background: var(--line); overflow: hidden; }
.strategy-matrix-head, .strategy-matrix-row { display: grid; grid-template-columns: repeat(var(--matrix-columns, 4), minmax(0, 1fr)); gap: 1px; }
.strategy-matrix-head > *, .strategy-matrix-row > * { min-width: 0; padding: var(--lh-space-4); background: #fff; overflow-wrap: anywhere; }
.strategy-matrix-head strong { color: var(--cobalt); font-family: var(--font-mono); font-size: 10px; font-weight: 500; letter-spacing: .06em; text-transform: uppercase; }
.strategy-matrix-row span { color: var(--ink-soft); font-size: 14px; line-height: 1.5; }
.strategy-matrix-row span:first-child { color: var(--ink); font-weight: 600; }
.stage-sources { padding-bottom: var(--lh-space-16); }
.stage-pagination { display: grid; grid-template-columns: 1fr 1fr; gap: var(--lh-space-2); margin-top: var(--lh-space-10); }
.stage-pagination a { display: grid; min-height: 120px; padding: var(--lh-space-5); background: var(--paper-bright); color: var(--ink); text-decoration: none; }
.stage-pagination a:last-child { text-align: right; }
.stage-pagination span { color: var(--cobalt); font-family: var(--font-mono); font-size: 10px; letter-spacing: .06em; text-transform: uppercase; }
.stage-pagination strong { align-self: end; font-size: 18px; }

@media (max-width: 900px) {
  .research-grid, .research-grid.is-compact { grid-template-columns: 1fr; }
  .research-card { min-height: auto; }
  .research-card h3 { margin-top: var(--lh-space-8); }
  .process-stack li { grid-template-columns: 42px minmax(0, 1fr); gap: var(--lh-space-4); padding: var(--lh-space-5); }
  .process-stack small { grid-column: 2; text-align: left; }
  .strategy-matrix { gap: var(--lh-space-2); background: transparent; }
  .strategy-matrix-head { display: none; }
  .strategy-matrix-row { grid-template-columns: 1fr; gap: 0; background: var(--paper-bright); padding: var(--lh-space-4); }
  .strategy-matrix-row > * { padding: var(--lh-space-2) 0; background: transparent; }
}

@media (max-width: 560px) {
  .stage-pagination { grid-template-columns: 1fr; }
  .stage-pagination a:last-child { text-align: left; }
}
}