/* ============================================================
   TURKIN V2.2 — Signal Atlas layout system
   ============================================================
   Порядок: tokens → primitives → typography → components.
   Три документированных breakpoint: 640 / 960 / 1280.
   Сложные компоненты используют container queries.
   Запреты: ellipsis, line-clamp, fixed height у текста,
   overflow hidden со смысловым контентом, absolute для каркаса,
   !important вне print (кроме reduced-motion).
   ============================================================ */

/* ---------- design tokens ---------- */
:root {
  --bg: #f4f1ea;
  --bg-elev: #faf8f2;
  --bg-sunken: #ece7dc;
  --ink: #1c1a17;
  --ink-2: #57534a;
  --line: #ded7c7;
  --line-strong: #a89e88;
  --signal: #e85d3d;
  --signal-ink: #a3331a;   /* 4.9:1 on --signal-soft, 6.2:1 on --bg */
  --signal-soft: rgba(232, 93, 61, 0.12);
  --focus-ring: var(--signal);

  /* Borders and radii.
     Near-square on purpose: soft 12-18px corners plus elevated panels are the
     visual signature of generic AI landing pages. Hairlines carry structure. */
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --line-w-1: 1px;
  --line-w-2: 2px;

  /* spacing scale */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 24px;
  --s-6: 32px;
  --s-7: 48px;
  --s-8: 64px;
  --s-9: 96px;
  --space: var(--s-9);

  /* type scale (rem от базового 16px; desktop базовый 17px) */
  --text-xs: 0.75rem;   /* 12px */
  --text-sm: 0.875rem;  /* 14px */
  --text-base: 1.0625rem; /* 17px */
  --text-md: 1.0625rem; /* 17px desktop */
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 2rem;
  --text-3xl: clamp(1.85rem, 3.5vw, 2.9rem);

  /* measure */
  --measure: 68ch;
  --measure-narrow: 58ch;

  /* containers and gutters */
  --container: 1120px;
  --container-wide: 1240px;
  --gutter: clamp(16px, 4vw, 24px);

  /* z-index scale */
  --z-skip: 100;
  --z-header: 50;
  --z-decor: 0;

  /* breakpoints (документированные): 640 / 960 / 1280 */
  --bp-sm: 640px;
  --bp-md: 960px;
  --bp-lg: 1280px;

  --font: system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  --mono: ui-monospace, 'Cascadia Mono', Consolas, 'Courier New', monospace;
  --shadow: 0 1px 2px rgba(28, 26, 23, .04), 0 8px 24px -16px rgba(28, 26, 23, .18);

  --ink-3: #6a675f;   /* 5.0:1 on --bg */
  --role-in: #6a675f;
  --role-work: #b43a1e;
  --role-out: #2f7d4e;
}
html.dark {
  --bg: #0b0b0c;
  --bg-elev: #111113;
  --bg-sunken: #080809;
  --ink: #f2f0ec;
  --ink-2: #a4a09a;
  --ink-3: #85827b;   /* 5.1:1 on --bg */
  --line: #2b2b33;
  --line-strong: #4a4a57;
  --signal: #ff5a38;
  --signal-ink: #ff8b73;
  --signal-soft: rgba(255, 90, 56, 0.11);
  --shadow: 0 1px 2px rgba(0, 0, 0, .25), 0 8px 24px -16px rgba(0, 0, 0, .55);
  --role-in: #85827b;
  --role-work: #ff5a38;
  --role-out: #6fc48c;
}

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

/* Any component that sets `display` silently defeats the `hidden` attribute.
   That is what broke the case filter: the attribute was set and the card
   stayed visible. This is the guard the HTML spec itself recommends. */
[hidden] { display: none !important; }
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
/* Fixed-position off-canvas elements (the mobile drawer) are measured on the
   root, not only on body, so the clip has to be declared on both. */
html { overflow-x: clip; }
html.dark { color-scheme: dark; }
body {
  margin: 0;
  /* The closed mobile drawer sits off-canvas. `clip` stops it from extending
     the scrollable width without creating a scroll container, so `position:
     sticky` on the header and the section rail keeps working. `hidden` would
     break both. */
  overflow-x: clip;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: var(--text-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  /* NOT break-word.
     A global break-word was the root cause of every mid-word split in the
     diagrams and stats ("Продуктовое ядро" -> "Прод/уктов/ое"). Russian
     compound technical terms are long; the fix is proper column widths, not
     permission to cut words anywhere. Unbreakable strings opt in below. */
  overflow-wrap: normal;
  word-break: normal;
  hyphens: manual;
}

/* Only content that can legitimately contain an unbreakable token opts in. */
code, kbd, samp, .allow-break, [data-allow-break] { overflow-wrap: anywhere; }
img, svg, video { max-inline-size: 100%; height: auto; display: block; }
a { color: var(--signal-ink); text-decoration: underline; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
p, li { max-width: var(--measure); }
/* Typography carries the hierarchy: display headings are markedly larger than
   section headings, which are markedly larger than block headings. In the
   previous version all three sat within a few pixels of each other, which made
   every section look equally important and the page read as flat. */
h1, h2, h3 { line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 0.5em; text-wrap: balance; }
h1 { font-size: clamp(1.8rem, 6.6vw, 4rem); font-weight: 680; letter-spacing: -0.028em; }
h2 { font-size: clamp(1.55rem, 3.1vw, 2.35rem); font-weight: 660; }
h3 { font-size: var(--text-lg); font-weight: 620; letter-spacing: -0.012em; }
code { font-family: var(--mono); font-size: 0.9em; }
button { font: inherit; color: inherit; }
::selection { background: var(--signal-soft); }

.sr-only {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; top: -60px; left: var(--s-4); z-index: var(--z-skip);
  background: var(--ink); color: var(--bg); padding: var(--s-2) var(--s-4); border-radius: var(--radius-sm);
  text-decoration: none; transition: top 0.18s ease;
}
.skip-link:focus { top: var(--s-3); }
:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 3px; border-radius: var(--radius-sm); }
.mono { font-family: var(--mono); font-size: var(--text-xs); letter-spacing: 0.02em; overflow-wrap: break-word; }
.eyebrow {
  display: inline-block; font-family: var(--mono); font-size: var(--text-xs);
  text-transform: uppercase; letter-spacing: 0.12em; color: var(--signal-ink); margin-bottom: var(--s-3);
}
.dot { display: inline-block; width: 4px; height: 4px; border-radius: 50%; background: var(--line-strong); }
[hidden] { display: none; }
button[hidden] { display: none; }

/* ---------- layout primitives ---------- */
.container, .shell {
  max-inline-size: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: var(--space); }
.stack { display: grid; gap: var(--s-4); }
.split {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s-6); align-items: start;
}
.measure { max-inline-size: var(--measure); }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: var(--z-header);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: var(--line-w-1) solid var(--line);
}
.header-inner { min-inline-size: 0; display: flex; align-items: center; gap: var(--s-3); min-height: 64px; }
.brand {
  display: inline-flex; align-items: center; gap: var(--s-2);
  color: var(--ink); text-decoration: none; font-weight: 700; letter-spacing: 0.04em;
}
.brand-mark {
  width: 18px; height: 18px; border-radius: 50%; border: var(--line-w-2) solid var(--ink);
  position: relative; flex: none;
}
.brand-mark::after { content: ''; position: absolute; inset: 4px; border-radius: 50%; background: var(--signal); }
.main-nav { display: flex; gap: var(--s-1); margin-inline-start: auto; }
.nav-link {
  color: var(--ink-2); text-decoration: none; font-size: var(--text-sm);
  padding: var(--s-2) var(--s-3); border-radius: var(--radius-sm); white-space: nowrap;
}
.nav-link:hover { color: var(--ink); background: var(--bg-sunken); }
.nav-link.is-active { color: var(--ink); background: var(--bg-sunken); box-shadow: inset 0 -2px 0 var(--signal); }
.nav-link--cta {
  border: var(--line-w-1) solid var(--line-strong); border-radius: var(--radius);
  color: var(--ink); padding: var(--s-2) var(--s-4);
}
.nav-link--cta:hover { border-color: var(--signal); color: var(--signal-ink); }
.language-switch {
  display: inline-flex; flex: none; align-items: center; gap: 2px;
  font-family: var(--mono); font-size: var(--text-xs); letter-spacing: 0.08em;
}
.language-switch span { color: var(--ink-3); }
.language-switch a {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 44px; min-height: 44px; padding-inline: 4px;
  color: var(--ink-3); text-decoration: none; font-weight: 600;
}
.language-switch a:hover { color: var(--ink); }
.language-switch a[aria-current="page"] { color: var(--ink); }
.theme-toggle {
  flex: none; width: 44px; height: 44px; border-radius: 50%;
  border: var(--line-w-1) solid var(--line); background: var(--bg-elev); cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  transition: border-color 160ms ease, background-color 160ms ease;
}
.theme-toggle:hover { border-color: var(--signal); background: var(--signal-soft); }
.theme-toggle:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }

.theme-toggle__icon {
  position: relative;
  inline-size: 18px; block-size: 18px;
  border-radius: 50%;
  background: var(--ink);
  transition: transform 260ms cubic-bezier(0.3, 0, 0.2, 1), background-color 260ms ease;
}
/* The rays: eight short strokes drawn with a single repeating gradient ring. */
.theme-toggle__icon::before {
  content: '';
  position: absolute; inset: -7px;
  border-radius: 50%;
  background:
    conic-gradient(from 22.5deg,
      var(--ink) 0 6deg, transparent 6deg 45deg,
      var(--ink) 45deg 51deg, transparent 51deg 90deg,
      var(--ink) 90deg 96deg, transparent 96deg 135deg,
      var(--ink) 135deg 141deg, transparent 141deg 180deg,
      var(--ink) 180deg 186deg, transparent 186deg 225deg,
      var(--ink) 225deg 231deg, transparent 231deg 270deg,
      var(--ink) 270deg 276deg, transparent 276deg 315deg,
      var(--ink) 315deg 321deg, transparent 321deg 360deg);
  -webkit-mask: radial-gradient(circle, transparent 0 11px, #000 11px);
  mask: radial-gradient(circle, transparent 0 11px, #000 11px);
  opacity: 1;
  transform: rotate(0deg) scale(1);
  transition: opacity 200ms ease, transform 320ms cubic-bezier(0.3, 0, 0.2, 1);
}
/* The crescent: a second disc in the surface colour, parked off to the side in
   light mode and sliding across to bite the circle in dark mode. */
.theme-toggle__icon::after {
  content: '';
  position: absolute; inset-block-start: -4px; inset-inline-start: 12px;
  inline-size: 18px; block-size: 18px;
  border-radius: 50%;
  background: var(--bg-elev);
  transform: translate(6px, -6px) scale(0.6);
  opacity: 0;
  transition: transform 300ms cubic-bezier(0.3, 0, 0.2, 1), opacity 200ms ease, background-color 260ms ease;
}
.theme-toggle:hover .theme-toggle__icon::after { background: color-mix(in srgb, var(--signal-soft) 100%, var(--bg-elev)); }

html.dark .theme-toggle__icon { transform: scale(0.92); }
html.dark .theme-toggle__icon::before { opacity: 0; transform: rotate(-45deg) scale(0.5); }
html.dark .theme-toggle__icon::after { transform: translate(-6px, 1px) scale(1); opacity: 1; }

@media (prefers-reduced-motion: reduce) {
  .theme-toggle__icon,
  .theme-toggle__icon::before,
  .theme-toggle__icon::after { transition: none; }
}
.menu-toggle {
  display: none; flex: none; width: 44px; height: 44px; border-radius: var(--radius-sm);
  border: var(--line-w-1) solid var(--line); background: var(--bg-elev); cursor: pointer;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.menu-toggle span { display: block; width: 18px; height: 2px; background: var(--ink); }
.menu-toggle .sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: var(--s-2);
  border-radius: var(--radius); padding: var(--s-3) var(--s-5); font-size: var(--text-base); font-weight: 600;
  text-decoration: none; cursor: pointer; border: var(--line-w-1) solid transparent;
  min-height: 48px; transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}
.btn svg { width: 18px; height: 18px; flex: none; }
/* Icons are line art: without this they fall back to a black fill and disappear
   on any dark surface, in either theme. */
.btn svg, .text-link svg, .icon svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.btn--primary { background: var(--ink); color: var(--bg); }
.btn--primary:hover { background: var(--signal); color: var(--bg); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn--ghost:hover { border-color: var(--signal); color: var(--signal-ink); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; pointer-events: none; }
.text-link { color: var(--signal-ink); text-decoration: none; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
.text-link svg { width: 16px; height: 16px; }
/* ---------- hero ---------- */
.hero { padding-block: var(--s-8) var(--s-7); }
.hero__grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--s-7) var(--s-8);
  align-items: start;
}
.hero__content { grid-column: 1 / 7; min-width: 0; }
.hero__map { grid-column: 8 / 13; min-width: 0; display: flex; flex-direction: column; gap: var(--s-6); }
.hero h1 { margin-bottom: var(--s-5); }
.hero__lead { font-size: var(--text-md); color: var(--ink-2); margin: 0 0 var(--s-6); max-width: 46ch; }
.hero__cta { display: flex; flex-wrap: wrap; gap: var(--s-3); margin-bottom: 0; }
.hero__cta .btn { padding-inline: var(--s-4); font-size: var(--text-base); }
/* Three facts as rows, not columns: at ~480px of column width three columns
   force one value onto two lines while its neighbours stay on one, which reads
   as a misalignment. Rows keep the baseline honest at every width. */
.hero__facts { margin: 0; border-top: var(--line-w-1) solid var(--line); }
.hero__facts div {
  display: grid;
  grid-template-columns: minmax(0, 15ch) minmax(0, 1fr);
  gap: var(--s-4);
  align-items: baseline;
  padding: var(--s-3) 0;
  border-bottom: var(--line-w-1) solid var(--line);
  min-width: 0;
}
.hero__facts div:last-child { border-bottom: 0; }
.hero__facts dt { font-size: var(--text-base); font-weight: 660; color: var(--ink); letter-spacing: -0.01em; }
.hero__facts dd { margin: 0; font-size: var(--text-sm); color: var(--ink-2); line-height: 1.4; }

@media (max-width: 1100px) {
  .hero__content { grid-column: 1 / 13; }
  .hero__map { grid-column: 1 / 13; }
}
@media (max-width: 560px) {
  .hero { padding-block: var(--s-6) var(--s-6); }
  .hero__facts div { grid-template-columns: 1fr; gap: 2px; }
  .hero__cta .btn { width: 100%; justify-content: space-between; }
}

/* ---------- hero map ---------- */
.hero-map { margin: 0; max-inline-size: 640px; width: 100%; }
.hero-map__control.is-active { border-color: var(--signal); color: var(--signal-ink); background: var(--signal-soft); }

/* ---------- sections ---------- */
section { scroll-margin-top: 84px; }
.modes, .responsibility, .featured-cases, .proofs, .case-list, .service-list, .scope-app,
.funnel, .faq, .trust-block, .contact-block, .case-detail, .xray, .contact-page { padding-block: var(--space); }
.section-heading { margin-bottom: var(--s-7); max-width: 46ch; }
.section-heading h2 { margin-bottom: var(--s-4); }
.section-heading h2 { max-width: 24ch; }
.section-heading p { color: var(--ink-2); margin: 0; max-width: 62ch; }

.modes__grid, .cases-grid, .proofs-grid, .services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, var(--grid-min, 300px)), 1fr));
  gap: var(--s-5);
}
.proofs-grid { --grid-min: 320px; }
.mode-card {
  background: var(--bg-elev); border: var(--line-w-1) solid var(--line); border-radius: var(--radius);
  padding: var(--s-5); display: flex; flex-direction: column; gap: var(--s-3);
}
.mode-card__num { color: var(--signal-ink); }
.mode-card h3 { margin: 0; font-size: var(--text-xl); }
.mode-card > p { color: var(--ink-2); margin: 0; }
.mode-card__list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--s-2); }
.mode-card__list li { display: flex; gap: var(--s-2); align-items: center; font-size: var(--text-sm); max-width: none; }
.mode-card__list svg { width: 16px; height: 16px; fill: var(--signal); flex: none; }
.mode-card__result { border-top: var(--line-w-1) dashed var(--line); padding-top: var(--s-3); font-size: var(--text-sm); color: var(--ink); margin-top: auto; }
.mode-card__result .mono { color: var(--ink-2); }
.modes__foot { margin-top: var(--s-6); }

/* ---------- responsibility layers: single definition lives near the end ---------- */
.layers-chips { display: flex; flex-wrap: wrap; gap: var(--s-2); }
.chip {
  border: var(--line-w-1) solid var(--line); border-radius: var(--radius); padding: var(--s-1) var(--s-3);
  color: var(--ink-2); background: var(--bg-elev); font-size: var(--text-xs);
}

/* ---------- case cards ---------- */
.case-card {
  border: var(--line-w-1) solid var(--line); border-radius: var(--radius); background: var(--bg-elev);
  padding: var(--s-5); display: flex; flex-direction: column; gap: var(--s-3);
  box-shadow: var(--shadow); min-width: 0;
}
.case-card__meta { display: flex; align-items: center; gap: var(--s-2); color: var(--ink-2); font-size: var(--text-xs); }
.case-card h3 { margin: 0; font-size: var(--text-lg); }
.case-card h3 a { color: var(--ink); text-decoration: none; }
.case-card h3 a:hover { color: var(--signal-ink); }
.case-card__foot { display: flex; align-items: center; gap: var(--s-2); margin-top: auto; flex-wrap: wrap; }
.badge {
  border: var(--line-w-1) solid var(--line-strong); border-radius: var(--radius); padding: 3px 10px;
  font-size: var(--text-xs); color: var(--ink-2); background: var(--bg);
}

/* ---------- proofs ---------- */
.proof-card {
  border: var(--line-w-1) solid var(--line); border-radius: var(--radius); background: var(--bg-elev);
  padding: var(--s-5); display: flex; flex-direction: column; gap: var(--s-3); min-width: 0;
}
.proof-card__meta { display: flex; align-items: center; gap: var(--s-2); color: var(--ink-2); font-size: var(--text-xs); }
.proof-card h3 { margin: 0; font-size: var(--text-lg); }
.proof-card > p { color: var(--ink-2); margin: 0; font-size: var(--text-sm); max-width: none; }
.proof-card__facts { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--s-2); }
.proof-card__facts li { display: flex; gap: var(--s-2); align-items: flex-start; font-size: var(--text-sm); max-width: none; }
.proof-card__facts svg { width: 15px; height: 15px; flex: none; margin-top: 4px; stroke: var(--signal-ink); stroke-width: 2; fill: none; }
.proof-card__note { color: var(--ink-2); font-size: var(--text-xs); border-inline-start: 2px solid var(--line-strong); padding-inline-start: var(--s-2); }
.engineering-note {
  margin-top: var(--s-6); border: var(--line-w-1) dashed var(--line-strong); border-radius: var(--radius);
  padding: var(--s-5); background: var(--bg-elev);
}
.engineering-note p { margin: 0; color: var(--ink-2); }

/* ---------- filters ---------- */
.case-filters { padding-block: var(--s-2) 0; }
.case-filters__row { display: flex; flex-wrap: wrap; gap: var(--s-2); }
.case-filters__row button {
  font-family: var(--mono); font-size: var(--text-xs); border: var(--line-w-1) solid var(--line-strong);
  background: var(--bg-elev); color: var(--ink-2); border-radius: var(--radius); padding: var(--s-2) var(--s-4); cursor: pointer; min-height: 44px;
}
.case-filters__row button.is-active { border-color: var(--signal); color: var(--signal-ink); background: var(--signal-soft); }
.case-list { padding-top: var(--s-6); }

/* ---------- scope block ---------- */
.scope-block__inner {
  display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr); gap: var(--s-7); align-items: center;
  border: var(--line-w-1) solid var(--line); border-radius: var(--radius-lg); background: var(--bg-elev);
  padding: var(--s-7); box-shadow: var(--shadow);
}
.scope-block__text h2 { max-width: 18ch; }
.scope-block__text > p { color: var(--ink-2); }
.scope-block__after { font-size: var(--text-sm); margin-top: var(--s-5); border-top: var(--line-w-1) dashed var(--line); padding-top: var(--s-4); }
.scope-block__text .btn { margin-top: var(--s-2); margin-inline-end: var(--s-2); }

/* ---------- funnel ---------- */
.funnel__list {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); gap: var(--s-4);
}
.funnel__list li { border: 0; border-radius: var(--radius); background: var(--bg-elev); box-shadow: var(--shadow); padding: var(--s-5); min-width: 0; }
.funnel__num { display: none; }
.funnel__list h3 { font-size: var(--text-md); margin-bottom: var(--s-2); }
.funnel__list p { color: var(--ink-2); font-size: var(--text-sm); margin: 0; }

/* ---------- callouts ---------- */
.callout {
  border: var(--line-w-1) solid var(--line); border-inline-start: 3px solid var(--signal); border-radius: var(--radius);
  padding: var(--s-4) var(--s-5); background: var(--bg-elev); margin-block: var(--s-5);
}
.callout p { margin: 0; color: var(--ink); }
.callout__mark { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--signal); margin-inline-end: var(--s-2); }

/* ---------- faq ---------- */
.faq__list { display: grid; gap: var(--s-3); max-width: 820px; }
.faq__item { border: var(--line-w-1) solid var(--line); border-radius: var(--radius); background: var(--bg-elev); }
.faq__item summary {
  cursor: pointer; padding: var(--s-4) var(--s-5); font-weight: 600; list-style-position: outside;
  display: flex; align-items: center; justify-content: space-between; gap: var(--s-4);
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after { content: '+'; font-family: var(--mono); color: var(--signal-ink); font-size: var(--text-lg); }
.faq__item[open] summary::after { content: '−'; }
.faq__item p { margin: 0; padding: 0 var(--s-5) var(--s-4); color: var(--ink-2); }

/* ---------- trust ---------- */
.trust-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-7); }
.process-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--s-5); }
.process-list li { position: relative; padding-inline-start: var(--s-7); min-width: 0; }
.process-list__num { display: none; }
.process-list__num--unused {
  position: absolute; inset-inline-start: 0; top: 0; width: 40px; height: 40px; border-radius: 50%;
  border: var(--line-w-1) solid var(--line-strong); display: inline-flex; align-items: center; justify-content: center;
  color: var(--signal-ink); background: var(--bg-elev);
}
.process-list h3 { margin-bottom: var(--s-1); }
.process-list p { color: var(--ink-2); margin: 0; }
.process-list--wide { grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); gap: var(--s-4); }
.process-list--wide li { padding-inline-start: 0; padding-top: var(--s-7); }
.process-list--wide .process-list__num { display: none; }
.process-list__num--unused { top: 0; }
.trust-points { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--s-5); }
.trust-points li { border: var(--line-w-1) solid var(--line); border-radius: var(--radius); padding: var(--s-4) var(--s-5); background: var(--bg-elev); min-width: 0; }
.trust-points h3 { font-size: var(--text-md); margin-bottom: var(--s-1); }
.trust-points p { color: var(--ink-2); margin: 0; font-size: var(--text-sm); }

/* ---------- contact block ---------- */
.contact-block__inner {
  display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); gap: var(--s-7); align-items: center;
  border: var(--line-w-1) solid var(--line); border-radius: var(--radius-lg); background: var(--bg-elev); padding: var(--s-7);
}
.contact-block__inner h2 { max-width: 16ch; }
.contact-block__inner p { color: var(--ink-2); }
.contact-block__actions { display: flex; flex-direction: column; gap: var(--s-3); align-items: flex-start; }

/* ---------- page head / breadcrumbs ---------- */
.page-head { padding-block: var(--s-7) var(--s-6); }
.page-head h1 { max-width: 20ch; }
.page-head__lead { color: var(--ink-2); font-size: var(--text-md); max-width: 62ch; }
.breadcrumbs { margin-bottom: var(--s-5); }
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: var(--s-1); margin: 0; padding: 0; font-family: var(--mono); font-size: var(--text-xs); color: var(--ink-2); }
.breadcrumbs li { display: inline-flex; align-items: center; gap: var(--s-1); }
.breadcrumbs li:not(:last-child)::after { content: '/'; color: var(--line-strong); }
.breadcrumbs a { color: var(--ink-2); text-decoration: none; }
.breadcrumbs a:hover { color: var(--signal-ink); }
/* ---------- case detail ---------- */
.case-detail { background: var(--bg); }
.case-detail__head { padding-top: var(--s-2); }
.case-detail__meta { display: flex; align-items: center; gap: var(--s-2); color: var(--ink-2); margin-bottom: var(--s-3); }
.case-detail__head .badge { margin-inline-end: var(--s-1); }
.case-detail h1 { font-size: clamp(1.7rem, 3.2vw, 2.6rem); max-width: 26ch; }
.case-section { padding-block: var(--s-6); border-top: var(--line-w-1) solid var(--line); }
.case-section__grid { display: grid; grid-template-columns: minmax(0, 280px) minmax(0, 1fr); gap: var(--s-6) var(--s-7); align-items: start; }
.case-section__head h2,
.case-mobile-disclosure > summary h2 {
  margin: 0;
  position: sticky;
  top: 96px;
  font-size: clamp(1.35rem, 2vw, 1.75rem);
  text-wrap: balance;
  hyphens: manual;
}
.case-section__body { max-width: var(--measure); min-width: 0; }
.case-section p { color: var(--ink-2); }

.case-detail__cta { display: flex; flex-wrap: wrap; gap: var(--s-3); margin-top: var(--s-5); }
.check-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--s-2); }
.check-list li { display: flex; gap: var(--s-3); align-items: flex-start; max-width: var(--measure); min-width: 0; }
.check-list li::before { content: ''; flex: none; width: 8px; height: 8px; border-radius: 50%; background: var(--signal); margin-top: 9px; }
.case-stack { background: none; }
.case-stack p { color: var(--ink-2); }

/* ---------- case panel: content-adaptive (auto-grid, no 5 equal columns) ---------- */
.case-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
  gap: var(--s-4);
  margin-top: var(--s-5);
}
.case-panel__cell {
  border: var(--line-w-1) solid var(--line); border-radius: var(--radius); background: var(--bg-elev);
  padding: var(--s-4) var(--s-5); display: grid; gap: var(--s-1); align-content: start; min-width: 0;
}
.case-panel__key { color: var(--ink-2); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.06em; }
.case-panel__value { font-size: var(--text-sm); line-height: 1.55; overflow-wrap: anywhere; }
.mini-timeline { display: flex; flex-wrap: wrap; gap: var(--s-1) var(--s-2); align-items: center; }
.mini-timeline__step { font-size: var(--text-sm); color: var(--ink-2); }
.mini-timeline__arrow { color: var(--signal); font-size: var(--text-sm); }

/* ---------- timeline ---------- */
  list-style: none; margin: var(--s-6) 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 150px), 1fr));
  gap: var(--s-2); position: relative;
}

/* ---------- layer map ---------- */
.layer-map {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: var(--s-3);
}
.layer-map__item { border: var(--line-w-1) solid var(--line); border-radius: var(--radius); padding: var(--s-4) var(--s-5); background: var(--bg-elev); display: grid; gap: var(--s-1); min-width: 0; }
.layer-map__key { color: var(--signal-ink); }
.layer-map__value { color: var(--ink-2); font-size: var(--text-sm); }

/* ---------- xray ---------- */
.xray__tabs { display: flex; gap: var(--s-2); flex-wrap: wrap; margin-bottom: var(--s-5); }
.xray__tabs button, .xray__layer-tabs button {
  font-family: var(--mono); font-size: var(--text-xs); border: var(--line-w-1) solid var(--line-strong);
  background: var(--bg-elev); color: var(--ink-2); border-radius: var(--radius); padding: var(--s-2) var(--s-4); cursor: pointer; min-height: 44px;
}
.xray__tabs button.is-active, .xray__layer-tabs button.is-active { border-color: var(--signal); color: var(--signal-ink); background: var(--signal-soft); }
.xray__view { display: none; border: var(--line-w-1) solid var(--line); border-radius: var(--radius); background: var(--bg-elev); padding: var(--s-5); }
.xray__view.is-active { display: block; }
.xray__view p { color: var(--ink-2); }
.xray__layers { margin-top: var(--s-5); }
.xray__layer-tabs { display: flex; gap: var(--s-2); flex-wrap: wrap; margin-bottom: var(--s-3); }
.xray__layer-panel { display: none; border: var(--line-w-1) solid var(--line); border-radius: var(--radius); background: var(--bg-elev); padding: var(--s-5); }
.xray__layer-panel.is-active { display: block; }
.xray__layer-panel .mono { color: var(--signal-ink); display: block; margin-bottom: var(--s-2); }
.xray__layer-panel p { margin: 0; color: var(--ink-2); }

/* ---------- services ---------- */
.service-card {
  display: flex; flex-direction: column; gap: var(--s-3); border: var(--line-w-1) solid var(--line);
  border-radius: var(--radius); background: var(--bg-elev); padding: var(--s-5);
  text-decoration: none; color: var(--ink); box-shadow: var(--shadow); min-width: 0;
  transition: border-color 0.18s ease, transform 0.18s ease;
}
.service-card:hover { border-color: var(--signal); transform: translateY(-2px); }
.service-card__eyebrow { color: var(--signal-ink); }
.service-card h3 { margin: 0; font-size: var(--text-lg); }
.service-card p { color: var(--ink-2); margin: 0; max-width: none; }
.service-card .text-link { margin-top: auto; }
.service-process { padding-block: 0 var(--space); }
.service-process .process-list--wide { border-top: var(--line-w-1) solid var(--line); padding-top: var(--s-7); }
.service-detail .case-section p { max-width: var(--measure); }

/* ---------- contact page ---------- */
.contact-page__grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-4); }
.contact-page__card { border: var(--line-w-1) solid var(--line); border-radius: var(--radius); background: var(--bg-elev); padding: var(--s-6); min-width: 0; }
.contact-page__card p { color: var(--ink-2); }
.contact-page__qr { display: flex; flex-direction: column; align-items: center; gap: var(--s-2); margin-top: var(--s-5); }
.contact-page__qr img {
  border: 0;
  border-radius: var(--radius);
  background: #fff;
  padding: 14px;
  box-shadow: var(--shadow);
}
.contact-form { display: grid; gap: var(--s-2); margin-top: var(--s-4); }
.contact-form label { font-weight: 600; }
.contact-form textarea {
  width: 100%; min-height: 150px; border: var(--line-w-1) solid var(--line-strong); border-radius: var(--radius-sm);
  background: var(--bg); color: var(--ink); font: inherit; padding: var(--s-3); resize: vertical;
}
.contact-form textarea:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; }
.contact-form .btn { justify-content: center; }
.contact-page__note { display: flex; align-items: flex-start; gap: var(--s-2); font-size: var(--text-xs); color: var(--ink-2); }
.contact-page__note svg { width: 16px; height: 16px; flex: none; margin-top: 2px; fill: none; stroke: var(--signal-ink); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* Legacy ScopeMap styles removed: the tool is now the brief component.
   Original block preserved in archive/docs/legacy-scope-styles.css.txt */

/* ---------- quality panel + footer ---------- */
.quality-panel { border: var(--line-w-1) dashed var(--line-strong); border-radius: var(--radius); padding: var(--s-4) var(--s-5); margin-block: var(--s-6) var(--s-2); }
.quality-panel__head { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--s-3); margin-bottom: var(--s-3); }
.quality-panel__head .eyebrow { margin-bottom: 0; }
.quality-panel__head p { margin: 0; color: var(--ink-2); font-size: var(--text-sm); }
.quality-panel__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); gap: var(--s-3) var(--s-5); margin: 0; }
.quality-panel__grid div { display: grid; gap: 2px; }
.quality-panel dt { color: var(--ink-2); font-size: var(--text-xs); }
.quality-panel dd { margin: 0; font-family: var(--mono); font-size: var(--text-sm); overflow-wrap: anywhere; }
.quality-panel__details { margin-top: var(--s-4); border-top: var(--line-w-1) solid var(--line); padding-top: var(--s-3); }
.quality-panel__details summary { width: fit-content; min-height: 44px; display: flex; align-items: center; cursor: pointer; color: var(--signal-ink); font-weight: 700; }
.quality-panel__details p { max-width: 72ch; margin: var(--s-2) 0 0; color: var(--ink-2); font-size: var(--text-sm); }
.site-footer { border-top: var(--line-w-1) solid var(--line); padding-block: var(--s-7) var(--s-6); background: none; }
.footer-top { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr); gap: var(--s-6); }
.footer-brand p { color: var(--ink-2); font-size: var(--text-sm); margin: var(--s-3) 0 0; }
.footer-nav { display: flex; flex-direction: column; gap: var(--s-2); align-items: flex-start; }
.footer-nav a { color: var(--ink-2); text-decoration: none; font-size: var(--text-sm); }
.footer-nav a:hover { color: var(--signal-ink); }
.footer-bottom {
  display: flex; justify-content: space-between; gap: var(--s-3); flex-wrap: wrap;
  border-top: var(--line-w-1) solid var(--line); margin-top: var(--s-6); padding-top: var(--s-4);
  color: var(--ink-2); font-size: var(--text-sm);
}

/* ---------- 404 ---------- */
.page-head--404 { padding-block: var(--s-9); }

/* ============================================================
   Responsive — два содержательных breakpoint (640 / 960)
   Плюс container query у мастера ScopeMap.
   ============================================================ */
@media (max-width: 960px) {
  body { font-size: var(--text-md); }
  .header-inner { flex-wrap: wrap; }
  .menu-toggle { display: flex; margin-inline-start: auto; }
  .main-nav {
    order: 5; inline-size: 100%; display: none; flex-direction: column; gap: var(--s-1);
    padding-block: var(--s-3); border-top: var(--line-w-1) solid var(--line);
  }
  .main-nav.is-open { display: flex; }
  .nav-link { padding: var(--s-3) var(--s-2); font-size: var(--text-base); white-space: normal; }
  .nav-link--cta { text-align: center; }
  .hero__grid { grid-template-columns: minmax(0, 1fr); gap: var(--s-6); }
  .hero__content { grid-column: auto; }
  .hero__map { grid-column: auto; max-inline-size: none; }
  .scope-block__inner, .contact-block__inner, .trust-grid, .contact-page__grid, .footer-top { grid-template-columns: minmax(0, 1fr); }
  .case-section__grid { grid-template-columns: minmax(0, 1fr); gap: var(--s-3); }
  .case-section__head h2, .case-mobile-disclosure > summary h2 { position: static; }
  .modes__grid, .cases-grid { --grid-min: 280px; }
}

@media (max-width: 640px) {
  :root { --space: var(--s-8); }
  body { font-size: var(--text-base); }
  .header-inner { gap: 4px; }
  .brand { margin-inline-end: auto; letter-spacing: 0.02em; }
  .language-switch a { padding-inline: 4px; }
  .hero h1 { font-size: clamp(1.72rem, 9.25vw, 2.1rem); }
  .hero { padding-block: var(--s-6) var(--s-5); }
  .hero__facts { --grid-min: 150px; }
  .modes__grid, .cases-grid, .proofs-grid, .services-grid { grid-template-columns: minmax(0, 1fr); }
  .case-panel { grid-template-columns: minmax(0, 1fr); }
  .funnel__list { grid-template-columns: minmax(0, 1fr); }
  .hero__facts { grid-template-columns: minmax(0, 1fr); gap: var(--s-3); }
  .quality-panel__grid { grid-template-columns: minmax(0, 1fr); }
  .scope-wizard__progress { flex-wrap: wrap; }
  .scope-wizard__progress .mono { white-space: normal; }
  .scope-block__inner, .contact-block__inner { padding: var(--s-5); }
  .layer-map { grid-template-columns: minmax(0, 1fr); }
  .process-list--wide { grid-template-columns: minmax(0, 1fr); }
  .case-detail__head h1 { font-size: clamp(1.6rem, 8vw, 2.2rem); }
  .page-head h1 { font-size: clamp(1.6rem, 8vw, 2.2rem); }
}

@media (max-width: 360px) {
  .hero h1 { font-size: 1.5rem; line-height: 1.12; }
  .language-switch a { padding-inline: 3px; }
  .brand { font-size: 0.93rem; }
  .brand-mark { width: 16px; height: 16px; }
}

/* ---------- motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ---------- print ---------- */
@media print {
  .site-header, .site-footer, .btn, .theme-toggle, .menu-toggle, .contact-block, .hero-map__controls { display: none !important; }
  body { background: #fff; color: #000; font-size: 12pt; }
  a { color: #000; text-decoration: none; }
  .scope-wizard { border: 0; box-shadow: none; }
  .scope-step { display: block !important; break-inside: avoid; }
  .case-section, .quality-panel { break-inside: avoid; }
  .scope-result__actions, .scope-wizard__nav, .scope-wizard__bar { display: none !important; }
}

/* ============================================================
   V2.4 — Living Product System
   Open compositions, semantic system maps and mobile story circuits.
   ============================================================ */
:root {
  --container: 1320px;
  --container-wide: 1320px;
  --gutter: clamp(16px, 3.4vw, 48px);
  --data: #567f92;
  --outcome: #6e896d;
  --risk: #a97842;
  --paper: #fbf8f1;
  --space: clamp(64px, 8vw, 116px);
  --text-md: clamp(1.0625rem, .28vw + 1rem, 1.1875rem);
}
html.dark { --data: #7ba5b6; --outcome: #91ad8f; --risk: #c69a67; --paper: #191816; }
body { font-size: var(--text-md); line-height: 1.62; }
.container { width: min(var(--container), calc(100% - (var(--gutter) * 2))); }
h1 { font-size: clamp(2.5rem, 4.35vw, 4.15rem); line-height: 1; letter-spacing: -.05em; }
h2 { font-size: clamp(2rem, 3.2vw, 3.9rem); line-height: 1.02; letter-spacing: -.04em; }
h3 { font-size: clamp(1.16rem, 1.1vw, 1.48rem); }
.eyebrow, .mono { font-size: max(.78rem, 12px); letter-spacing: .075em; }
.section-heading { max-width: 860px; margin-bottom: clamp(32px, 4vw, 64px); }
.section-heading p { font-size: clamp(1rem, .6vw + .9rem, 1.3rem); max-width: 62ch; }

/* Header + real mobile drawer */
.site-header { backdrop-filter: blur(12px); background: color-mix(in srgb, var(--bg) 90%, transparent); }
.header-inner { min-height: 72px; }
.menu-backdrop { display: none; }
.footer-proof { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); margin-top: var(--s-6); }
.footer-proof > summary { min-height: 56px; display: flex; justify-content: space-between; align-items: center; gap: 16px; cursor: pointer; font-weight: 700; }
.footer-proof > summary .mono { color: var(--ink-2); font-weight: 400; }
.footer-proof .quality-panel { border: 0; margin: 0; padding-inline: 0; }

/* Hero: the Product Engine */
.hero { padding-block: clamp(44px, 6vw, 88px) clamp(72px, 8vw, 120px); }
.hero__grid { grid-template-columns: minmax(0, 6.5fr) minmax(0, 5.5fr); align-items: start; gap: clamp(36px, 4vw, 68px); }
.hero__content { padding-top: clamp(12px, 2vw, 32px); }
.hero__content, .hero__map { grid-column: auto; }
.hero h1 { max-width: none; }
.hero__lead { font-size: clamp(1.05rem, .65vw + .9rem, 1.35rem); max-width: 48ch; }
.hero__facts { margin-top: clamp(32px, 4vw, 60px); padding-top: 24px; border-top: 1px solid var(--line-strong); }
.hero__facts dt { font-size: clamp(1.15rem, 1.3vw, 1.55rem); }
.product-engine__top > .mono { color: var(--ink-2); }
.hero-map__caption .mono { color: var(--outcome); }

/* Home routes and lifecycle */
.route-switch__source > span:last-child, .route-switch__source .mono, .route-switch__outcome .mono { color: var(--ink-2); font-size: .75rem; }

/* Three distinct case previews */
.case-showcases { display: grid; gap: 28px; }
.case-showcase { display: grid; grid-template-columns: minmax(280px, 4fr) minmax(520px, 8fr); gap: clamp(28px, 4vw, 72px); align-items: center; padding-block: 42px; border-top: 1px solid var(--line-strong); }
.case-showcase:nth-child(even) { grid-template-columns: minmax(520px, 8fr) minmax(280px, 4fr); }
.case-showcase:nth-child(even) .case-showcase__copy { order: 2; }
.case-showcase__copy p { color: var(--ink-2); }
.case-showcase__visual { min-height: 300px; border: 1px solid var(--line-strong); border-radius: 20px; padding: 26px; background: var(--paper); display: grid; align-content: space-between; }
.case-showcase__visual-label { color: var(--ink-2); }
.case-showcase__visual ol { list-style: none; padding: 0; margin: 34px 0 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; }
.case-showcase__visual li { min-height: 120px; padding: 18px 14px; border-top: 2px solid var(--signal); position: relative; display: grid; align-content: space-between; }
.case-showcase__visual li::before { content: ''; position: absolute; top: -7px; left: 14px; width: 12px; height: 12px; border-radius: 50%; background: var(--signal); }
.case-showcase--swimlane .case-showcase__visual li:nth-child(-n+2) { border-color: var(--risk); background: color-mix(in srgb, var(--risk) 9%, transparent); }
.case-showcase--swimlane .case-showcase__visual li:nth-child(n+3) { border-color: var(--outcome); }
.case-showcase--dependency .case-showcase__visual ol { grid-template-columns: 1fr 1.3fr 1fr 1.2fr; }
.case-showcase--dependency .case-showcase__visual li:nth-child(2) { border: 2px dashed var(--signal); border-radius: 10px; }

/* Services as capability/engagement map */
.service-list { padding-block: 20px var(--space); }

/* Flagship visual narrative */
.case-detail__head { padding-block: clamp(36px, 5vw, 78px); }
.case-detail__head h1 { max-width: 18ch; font-size: clamp(2.5rem, 4.6vw, 5.2rem); }
.case-panel {
  margin-top: var(--s-7);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: var(--s-4);
  background: none;
  border: 0;
}
.case-panel__cell {
  border: 0;
  border-radius: var(--radius);
  background: var(--bg-elev);
  box-shadow: var(--shadow);
  padding: var(--s-5);
  min-height: 0;
}
.case-section { padding-block: clamp(48px, 6vw, 88px); }
.case-section__grid { grid-template-columns: minmax(230px, 3fr) minmax(0, 8fr); gap: clamp(32px, 4vw, 72px); }
.layer-map { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--line-strong); }
.layer-map__item { border: 0; border-bottom: 1px solid var(--line); border-left: 3px solid var(--data); border-radius: 0; background: transparent; }
.case-mobile-disclosure { display: grid; grid-template-columns: minmax(220px, 3fr) minmax(0, 8fr); gap: clamp(36px, 6vw, 110px); grid-column: 1 / -1; }
.case-mobile-disclosure summary { list-style: none; cursor: default; }
.case-mobile-disclosure summary::-webkit-details-marker { display: none; }

/* About: responsibility system, not role cards */
.role-system { display: grid; grid-template-columns: minmax(0, 260px) minmax(0, 1fr); gap: var(--s-7); align-items: start; }
.role-system__core { display: grid; gap: var(--s-2); align-content: start; }
.role-system__core strong { font-size: clamp(1.75rem, 2.6vw, 2.6rem); }
.role-system__core > span:last-child { color: var(--ink-2); }
.role-system ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); gap: var(--s-4); }
.role-system li {
  display: grid; gap: var(--s-2); align-content: start;
  padding: var(--s-5); border: 0; border-radius: var(--radius);
  background: var(--bg-elev); box-shadow: var(--shadow);
}
.role-system li h3 { margin: 0; font-size: var(--text-md); }
.role-system li p { margin: 0; color: var(--ink-2); font-size: var(--text-sm); }

/* Contact context and compact 404 */
.contact-page__grid { grid-template-columns: .8fr 1.2fr; align-items: stretch; }
.contact-page__card { border-radius: 20px; padding: clamp(24px, 3vw, 44px); }
.contact-context { border: 0; padding: 0; margin: 0 0 24px; }
.contact-context legend { font-weight: 700; margin-bottom: 12px; }
.contact-context { display: flex; flex-wrap: wrap; gap: 8px; }
.contact-context legend { flex-basis: 100%; }
.contact-context input { position: absolute; opacity: 0; }
.contact-context .chip { min-height: 44px; display: inline-flex; align-items: center; gap: 8px; padding: 9px 14px; border: 1px solid var(--line-strong); border-radius: 10px; cursor: pointer; transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease); }
.contact-context .chip svg { width: 17px; height: 17px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; color: var(--ink-3); transition: color var(--dur) var(--ease); }
.contact-context .chip:hover { border-color: var(--signal-ink); }
.contact-context input:checked + .chip { background: var(--signal); border-color: var(--signal); color: #fff; }
.contact-context input:checked + .chip svg { color: #fff; }
.contact-context input:focus-visible + .chip { outline: 3px solid var(--focus-ring); outline-offset: 2px; }
.contact-scope-note { padding-block: 0 var(--space); }
.contact-scope-note .callout { max-width: 900px; }
.page-head--404 { padding-block: clamp(72px, 10vw, 150px); }
.lost-signal { display: grid; grid-template-columns: minmax(0, .9fr) minmax(480px, 1.1fr); gap: 70px; align-items: center; }
.signal-recovery { border: 1px solid var(--line-strong); border-radius: 20px; padding: 28px; background: var(--paper); }
.signal-recovery__nodes { display: grid; grid-template-columns: auto 1fr auto 1fr auto; align-items: center; gap: 10px; margin-block: 48px 24px; }
.signal-recovery__nodes > span, .signal-recovery__nodes > button { min-height: 54px; padding: 12px 16px; border: 1px solid var(--line-strong); border-radius: 10px; background: var(--bg); color: var(--ink); display: grid; place-items: center; font-weight: 700; }
.signal-recovery__nodes > button { cursor: pointer; border-color: var(--signal); }
.signal-recovery__nodes i { height: 2px; background: repeating-linear-gradient(90deg,var(--line-strong) 0 7px,transparent 7px 13px); }
.signal-recovery.is-recovered .signal-recovery__nodes i { background: var(--signal); }
.signal-recovery.is-recovered .signal-recovery__nodes > span:last-child { border-color: var(--outcome); }

@media (max-width: 1099px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__content { display: block; }
  .hero__content h1 { max-width: none; }
  .hero__map { max-width: none; }
  .case-showcase, .case-showcase:nth-child(even) { grid-template-columns: 1fr; }
  .case-showcase:nth-child(even) .case-showcase__copy { order: 0; }
  .case-section__grid { grid-template-columns: 1fr; gap: 26px; }
  .lost-signal { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  :root { --space: 68px; }
  body { font-size: 1rem; }
  h1, .hero h1, .page-head h1, .case-detail__head h1 { font-size: clamp(2rem, 9.5vw, 2.9rem); line-height: 1.03; }
  h2 { font-size: clamp(1.9rem, 9vw, 2.8rem); }
  .header-inner { flex-wrap: nowrap; min-height: 64px; }
  .site-header { backdrop-filter: none; }
  body.menu-open { overflow: hidden; }
  .menu-backdrop { position: fixed; inset: 0; z-index: 79; border: 0; background: rgba(0,0,0,.58); opacity: 0; pointer-events: none; display: block; transition: opacity .2s ease; }
  .menu-backdrop.is-open { opacity: 1; pointer-events: auto; }
  .main-nav { position: fixed; z-index: 80; top: 0; right: 0; bottom: 0; width: min(88vw, 360px); display: flex; flex-direction: column; justify-content: flex-start; gap: 8px; padding: 78px 24px 32px; border: 0; background: var(--paper); opacity: 0; pointer-events: none; visibility: hidden; overflow-y: auto; transition: none; }
  .main-nav.is-open { display: flex; opacity: 1; pointer-events: auto; visibility: visible; }
  .main-nav .nav-link { min-height: 54px; display: flex; align-items: center; padding: 12px 8px; border-bottom: 1px solid var(--line); font-size: 1.1rem; }
  .main-nav .nav-link--cta { margin-top: 12px; justify-content: center; border: 1px solid var(--signal); }
  .menu-toggle { position: relative; z-index: 81; }
  body.menu-open .menu-toggle { position: fixed; top: 10px; right: 12px; background: var(--paper); }
  .menu-toggle[aria-expanded="true"] span:not(.sr-only):first-child { transform: translateY(3.5px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:not(.sr-only):nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }
  .hero { padding-top: 34px; }
  .hero__content { display: block; }
  .hero h1 { max-width: 13ch; }
  .hero__facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .case-showcase { padding-block: 28px; }
  .case-showcase__visual { min-height: 0; padding: 18px; }
  .case-showcase__visual ol, .case-showcase--dependency .case-showcase__visual ol { grid-template-columns: 1fr; margin-top: 24px; padding-left: 16px; }
  .case-showcase__visual li { min-height: 78px; border-top: 0; border-left: 2px solid var(--signal); padding: 12px 14px 12px 22px; }
  .case-showcase__visual li::before { top: 18px; left: -7px; }
  .case-showcase--dependency .case-showcase__visual li:nth-child(2) { border: 0; border-left: 2px dashed var(--signal); border-radius: 0; }
  .case-panel { grid-template-columns: 1fr; }
  .case-panel__cell, .case-panel__cell:nth-child(n) { grid-column: auto; grid-row: auto; min-height: 0; }
  .role-system { grid-template-columns: 1fr; }
  .role-system__core { border-right: 0; border-bottom: 2px solid var(--signal); }
  .role-system ol { grid-template-columns: 1fr; }
  .role-system li:nth-last-child(-n+2) { border-bottom: 1px solid var(--line); }
  .role-system li:last-child { border-bottom: 0; }
  .layer-map { grid-template-columns: 1fr; }
  .layer-map__value { font-size: .96rem; }
  .case-mobile-disclosure { display: block; }
  .case-mobile-disclosure summary { min-height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 16px; cursor: pointer; }
  .case-mobile-disclosure summary::after { content: '+'; color: var(--signal); font-size: 1.5rem; }
  .case-mobile-disclosure[open] summary::after { content: '−'; }
  .case-mobile-disclosure summary h2 { margin: 0; font-size: clamp(1.5rem, 8vw, 2.2rem); }
  .case-mobile-disclosure .case-section__body { padding-top: 16px; }
  .contact-page__grid { grid-template-columns: 1fr; }
  .lost-signal { gap: 38px; }
  .signal-recovery { padding: 18px; }
  .signal-recovery__nodes { grid-template-columns: 1fr; margin-block: 28px 18px; }
  .signal-recovery__nodes i { width: 2px; height: 22px; justify-self: center; background: repeating-linear-gradient(180deg,var(--line-strong) 0 7px,transparent 7px 13px); }
  .footer-proof > summary { align-items: flex-start; flex-direction: column; justify-content: center; }
  .quality-panel__head p, .quality-panel__grid { display: none; }
}

@media (max-width: 340px) {
  .header-inner { gap: 0; }
  .brand { font-size: .82rem; }
  .brand-mark { width: 14px; height: 14px; }
  .language-switch { gap: 0; }
  .language-switch a { padding-inline: 2px; }
}

@media (prefers-reduced-motion: reduce) {
  .product-engine__node:hover { transform: none; }
}

/* ============================================================
   SIGNATURE SYSTEM — V2.5
   ============================================================
   Geometry contract for every diagram on the site:
     1. nodes occupy declared, equal grid tracks — never content width;
     2. connectors are pseudo-elements ON the node, so they cannot drift;
     3. labels are HTML, never SVG <text>, so text-wrap applies;
     4. no node may break a word: overflow-wrap stays normal everywhere.
   ============================================================ */

/* ---------- hero entry points (level 0) ---------- */
.entries { border-top: 1px solid var(--line); padding-top: var(--s-4); }
.entries__lead { color: var(--ink-2); margin: 0 0 var(--s-3); }
.entries__list { list-style: none; margin: 0; padding: 0; }
.entry + .entry { border-top: 1px solid var(--line); }
.entry__link {
  display: grid;
  grid-template-columns: 1fr 1.25rem;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-4) 0;
  min-height: 44px;
  color: inherit;
  text-decoration: none;
}
.entry__num { color: var(--ink-3); }
.entry__body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.entry__body strong { font-size: var(--text-md); font-weight: 620; letter-spacing: -0.01em; }
.entry__when { color: var(--ink-2); font-size: var(--text-sm); }
.entry__arrow { position: relative; width: 1.25rem; height: 1.25rem; }
.entry__arrow::before {
  content: '';
  position: absolute; top: 50%; right: 4px;
  width: 7px; height: 7px;
  border-top: 1px solid var(--line-strong);
  border-right: 1px solid var(--line-strong);
  transform: translateY(-50%) rotate(45deg);
  transition: transform 160ms ease, border-color 160ms ease;
}
.entry__link:hover .entry__arrow::before,
.entry__link:focus-visible .entry__arrow::before { border-color: var(--signal); transform: translate(3px, -50%) rotate(45deg); }
.entry__link:hover .entry__body strong { color: var(--signal-ink); }

/* ---------- route switch + flow diagram ---------- */
.routes { margin-top: var(--s-6); }
.routes__tabs {
  display: flex;
  flex-wrap: wrap;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  width: fit-content;
  max-width: 100%;
}
.routes__tab {
  appearance: none;
  background: none;
  border: 0;
  border-right: 1px solid var(--line);
  padding: 11px 18px;
  min-height: 44px;
  font: inherit;
  font-size: var(--text-sm);
  color: var(--ink-2);
  cursor: pointer;
  transition: color 140ms ease, background-color 140ms ease;
}
.routes__tab:last-child { border-right: 0; }
.routes__tab:hover { color: var(--ink); }
.routes__tab[aria-selected='true'] {
  color: var(--signal-ink);
  background: var(--signal-soft);
  box-shadow: inset 0 -2px 0 var(--signal);
}
.routes__tab:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: -2px; }

.routes__stage { margin-top: var(--s-5); border-top: 1px solid var(--line); padding-top: var(--s-5); }

/* Four equal tracks. This is the whole alignment guarantee. */
.flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.flow__node {
  position: relative;
  border: 1px solid var(--line);
  border-right: 0;
  border-left: 2px solid var(--line-strong);
  background: var(--bg-elev);
  padding: var(--s-3) var(--s-4) var(--s-4);
  min-height: 116px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  /* the anti-mid-word-break contract */
  overflow-wrap: normal;
  word-break: normal;
  hyphens: manual;
  text-wrap: pretty;
  max-width: none;
}
.flow__node:last-child { border-right: 1px solid var(--line); }
/* connector lives ON the node, so it cannot miss it */
.flow__node::after {
  content: '';
  position: absolute;
  top: 50%; right: -5px;
  width: 8px; height: 8px;
  border-top: 1.5px solid var(--ink-3);
  border-right: 1.5px solid var(--ink-3);
  /* No fill: a filled chevron punched a visible hole through the node border. */
  transform: translateY(-50%) rotate(45deg);
  z-index: 2;
}
.flow__node:last-child::after { content: none; }
.flow__node[data-role='in'] { border-left-color: var(--role-in); }
.flow__node[data-role='work'] { border-left-color: var(--role-work); }
.flow__node[data-role='out'] { border-left-color: var(--role-out); }
.flow__idx { color: var(--ink-3); font-size: var(--text-xs); }
.flow__title { font-size: var(--text-base); font-weight: 620; line-height: 1.25; letter-spacing: -0.01em; }
.flow__note { font-size: var(--text-sm); line-height: 1.35; color: var(--ink-2); margin-top: auto; max-width: none; }

.routes__outcome {
  margin: var(--s-5) 0 0;
  border-left: 2px solid var(--role-out);
  padding: 2px 0 2px var(--s-4);
  max-width: 68ch;
}
.routes__outcome .mono { display: block; color: var(--ink-3); margin-bottom: 2px; }
.routes__outcome strong { font-size: var(--text-md); font-weight: 620; color: var(--ink); }

.routes__legend { display: flex; flex-wrap: wrap; gap: var(--s-5); margin: var(--s-5) 0 0; }
.routes__legend span {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-family: var(--mono); font-size: var(--text-xs); letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--ink-3);
}
.routes__legend i { width: 12px; height: 2px; display: block; background: var(--line-strong); }
.routes__legend i[data-role='in'] { background: var(--role-in); }
.routes__legend i[data-role='work'] { background: var(--role-work); }
.routes__legend i[data-role='out'] { background: var(--role-out); }

/* Same DOM, vertical stack, arrows rotate. Nothing is lost on mobile. */
@media (max-width: 760px) {
  .flow { grid-template-columns: 1fr; }
  .flow__node { border-right: 1px solid var(--line); border-bottom: 0; min-height: 0; }
  .flow__node:last-child { border-bottom: 1px solid var(--line); }
  .flow__node::after { top: auto; right: auto; bottom: -5px; left: 22px; transform: translateX(-50%) rotate(135deg); }
  .routes__tabs { width: 100%; flex-direction: column; }
  .routes__tab { border-right: 0; border-bottom: 1px solid var(--line); text-align: left; }
  .routes__tab:last-child { border-bottom: 0; }
}

/* ---------- case grid ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}
.case-card {
  border-bottom: 1px solid var(--line);
  border-right: 1px solid var(--line);
  background: none;
  padding: 0;
  margin: 0;
}
.case-card:last-child { border-right: 1px solid var(--line); }
.case-card__link {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  height: 100%;
  padding: var(--s-5);
  color: inherit;
  text-decoration: none;
  transition: background-color 160ms ease;
}
.case-card__link:hover { background: var(--bg-elev); }
.case-card__link:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: -2px; }
.case-card__meta { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s-2); color: var(--ink-3); }
.case-card__nda, .case-card__draft {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 1px 6px;
  font-size: var(--text-xs);
}
.case-card__draft { border-color: var(--signal); color: var(--signal-ink); }
.case-card__title { margin: 0; font-size: var(--text-lg); line-height: 1.2; }
.case-card__link:hover .case-card__title { color: var(--signal-ink); }
.case-card__short { margin: 0; color: var(--ink-2); font-size: var(--text-sm); line-height: 1.5; max-width: none; }
.case-card__result { display: block; border-left: 2px solid var(--role-out); padding-left: var(--s-3); margin-top: auto; }
.case-card__result .mono { display: block; color: var(--ink-3); margin-bottom: 2px; }
.case-card__result strong { font-size: var(--text-sm); font-weight: 620; line-height: 1.4; }
.case-card__foot {
  display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-4);
  align-items: baseline; justify-content: space-between;
  border-top: 1px solid var(--line); padding-top: var(--s-3);
  /* reserve two lines so a wrapping role does not push this card's footer
     out of line with its neighbours; nothing is ever truncated */
  min-height: calc(2 * 1.5em + var(--s-3));
}
.case-card__role { font-size: var(--text-sm); color: var(--ink-2); }
.case-card__go { font-size: var(--text-sm); color: var(--signal-ink); white-space: nowrap; }
.case-card__go::after { content: ' →'; }
.case-card__tech { display: flex; flex-wrap: wrap; gap: var(--s-2); color: var(--ink-3); }
.case-card__tech span { border: 1px solid var(--line); border-radius: var(--radius); padding: 1px 6px; }



/* ---------- ScopeMap block + brief sheet ---------- */
.scope-block__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--s-8);
  align-items: start;
}
.scope-block__list { list-style: none; margin: 0 0 var(--s-6); padding: 0; display: grid; gap: var(--s-3); }
.scope-block__list li {
  position: relative; padding-left: var(--s-5);
  color: var(--ink-2); font-size: var(--text-base); max-width: 52ch;
}
.scope-block__list li::before {
  content: ''; position: absolute; left: 0; top: 0.65em;
  width: 10px; height: 1px; background: var(--signal);
}
.scope-block__cta { display: flex; flex-wrap: wrap; gap: var(--s-3); }
.scope-block__after { margin: var(--s-5) 0 0; font-size: var(--text-sm); color: var(--ink-3); max-width: 54ch; }

/* The brief: the ScopeMap deliverable, used both as a preview and as the result. */
.brief { margin: 0; border: var(--line-w-1) solid var(--line); border-radius: var(--radius); }
.brief__head {
  display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-5); align-items: baseline;
  padding: var(--s-4) var(--s-5);
  border-bottom: var(--line-w-1) solid var(--line);
  background: var(--bg-elev);
}
.brief__head .mono { color: var(--ink-3); }
.brief__head strong { font-size: var(--text-md); font-weight: 640; letter-spacing: -0.01em; }
.brief__rows { margin: 0; display: grid; }
.brief__row {
  display: grid; grid-template-columns: minmax(0, 150px) minmax(0, 1fr); gap: var(--s-5);
  padding: var(--s-4) var(--s-5);
  border-bottom: var(--line-w-1) solid var(--line);
}
.brief__row:last-child { border-bottom: 0; }
.brief__row dt { margin: 0; color: var(--ink-3); padding-top: 2px; }
.brief__row dd { margin: 0; color: var(--ink); max-width: none; }
.brief__row dd small { display: block; margin-top: var(--s-1); color: var(--ink-2); font-size: var(--text-sm); }

@media (max-width: 960px) {
  .scope-block__inner { grid-template-columns: 1fr; gap: var(--s-6); }
}
@media (max-width: 560px) {
  .brief__row { grid-template-columns: 1fr; gap: var(--s-1); }
  .scope-block__cta .btn { width: 100%; justify-content: space-between; }
}

/* ---------- ScopeMap wizard ---------- */
.scope-wizard { border: var(--line-w-1) solid var(--line); border-radius: var(--radius); }
.scope-wizard__progress { padding: var(--s-4) var(--s-5) 0; }
.scope-wizard__progress .mono { color: var(--ink-2); }
.scope-wizard__bar { margin-top: var(--s-3); height: 2px; background: var(--line); }
.scope-wizard__bar span { display: block; height: 100%; background: var(--signal); inline-size: 16.6%; transition: inline-size 200ms ease; }
.scope-wizard__form { padding: var(--s-5); }
.scope-step { border: 0; margin: 0; padding: 0; min-inline-size: 0; }
.scope-step legend { padding: 0; font-size: var(--text-xl); font-weight: 660; letter-spacing: -0.018em; }
.scope-step legend:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 4px; }
.scope-step__hint { margin: var(--s-2) 0 var(--s-5); color: var(--ink-2); font-size: var(--text-sm); }
.scope-options { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; border-top: var(--line-w-1) solid var(--line); }
.scope-option { border-bottom: var(--line-w-1) solid var(--line); }
.scope-option label {
  display: grid; grid-template-columns: 20px 1fr; gap: var(--s-3);
  align-items: start; padding: var(--s-4) var(--s-2); min-height: 44px; cursor: pointer;
}
.scope-option input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.scope-option__mark {
  inline-size: 18px; block-size: 18px; margin-top: 2px;
  border: var(--line-w-1) solid var(--line-strong); border-radius: var(--radius);
  position: relative; flex: none;
}
.scope-option input[type='radio'] + .scope-option__mark { border-radius: 50%; }
.scope-option label:hover .scope-option__mark { border-color: var(--signal); }
.scope-option input:checked + .scope-option__mark { border-color: var(--signal); background: var(--signal); }
.scope-option input:checked + .scope-option__mark::after {
  content: ''; position: absolute; inset-inline-start: 5px; inset-block-start: 1px;
  inline-size: 5px; block-size: 10px; border: solid var(--bg); border-width: 0 2px 2px 0; transform: rotate(45deg);
}
.scope-option input:focus-visible + .scope-option__mark { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
.scope-option__label { font-size: var(--text-base); }
.scope-wizard__nav { display: flex; flex-wrap: wrap; gap: var(--s-3); margin-top: var(--s-6); }
.scope-noscript { padding: 0 var(--s-5) var(--s-5); color: var(--ink-2); }

/* ---------- ScopeMap result ---------- */
.scope-result__head { margin-bottom: var(--s-6); }
.scope-result__head h2 { margin-bottom: var(--s-3); }
.scope-result:focus-visible { outline: none; }
.scale { display: inline-flex; gap: 3px; align-items: center; margin-bottom: var(--s-2); }
.scale i { inline-size: 34px; block-size: 6px; background: var(--line-strong); display: block; border-radius: 1px; }
.scale i[data-on] { background: var(--signal); }
.brief__row dd strong { display: block; font-weight: 620; }
.chips { display: flex; flex-wrap: wrap; gap: var(--s-2); }
.chips span { border: var(--line-w-1) solid var(--line-strong); border-radius: var(--radius); padding: 2px 9px; font-size: var(--text-sm); }
.chips span[data-later] { border-style: dashed; color: var(--ink-3); }
.scope-result__actions { display: flex; flex-wrap: wrap; gap: var(--s-3); margin-top: var(--s-5); }
.scope-result__note { margin: var(--s-4) 0 0; font-size: var(--text-sm); color: var(--ink-3); }
.scope-result__cases { margin: var(--s-4) 0 0; }
/* The raw text stays in the DOM for copy and print, off-screen for sighted users. */
.scope-result__raw {
  position: absolute; inline-size: 1px; block-size: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
@media print {
  .scope-wizard, .site-header, .scope-result__actions, .scope-result__note { display: none !important; }
  .scope-result__raw { position: static; inline-size: 100%; block-size: auto; clip: auto; white-space: pre-wrap; border: 1px solid #999; }
}

/* ---------- sticky section rail ---------- */
.rail {
  position: sticky;
  top: var(--header-h, 64px);
  z-index: calc(var(--z-header) - 1);
  background: var(--bg);
  border-block: var(--line-w-1) solid var(--line);
}
.rail__in {
  display: flex; align-items: stretch; overflow-x: auto; scrollbar-width: none;
  /* fades the right edge so it is visible that the rail continues */
  mask-image: linear-gradient(to right, #000 calc(100% - 32px), transparent 100%);
}
@media (min-width: 861px) { .rail__in { mask-image: none; } }
.rail__in::-webkit-scrollbar { display: none; }
.rail a {
  display: inline-flex; align-items: center; gap: var(--s-2);
  padding: 0 var(--s-4); min-height: 44px; white-space: nowrap;
  color: var(--ink-2); text-decoration: none; font-size: var(--text-sm);
  border-right: var(--line-w-1) solid var(--line);
}
.rail a:first-child { padding-left: 0; }
.rail a i { color: var(--ink-3); font-style: normal; }
.rail a:hover { color: var(--ink); }
.rail a[aria-current='true'] { color: var(--ink); box-shadow: inset 0 -2px 0 var(--signal); }
.rail a[aria-current='true'] i { color: var(--signal); }
.rail__cta { margin-left: auto; border-right: 0; color: var(--signal-ink) !important; }
/* On narrow screens the rail is a pure scroller. Overlaying the CTA on top of
   it obscured the last link, so the persistent action lives in the header
   instead — always visible, never covering anything. */
@media (max-width: 860px) {
  .rail__cta { display: none; }
}
/* Links must never shrink below their own text: at 390px they were squeezed
   until neighbouring labels printed on top of each other. The strip scrolls
   instead, with snap points so a swipe lands on a whole item. */
.rail a {
  flex: 0 0 auto;
  min-inline-size: 56px;
  justify-content: center;
  white-space: nowrap;
  scroll-snap-align: start;
  scroll-margin-inline: var(--gutter);
}
.rail__in { scroll-snap-type: x proximity; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  .rail__in { scroll-behavior: auto; }
}

/* Persistent action in the header, mobile only (desktop has it in the nav). */
.header-cta { display: none; }
@media (max-width: 960px) {
  .header-cta {
    display: inline-flex; align-items: center;
    /* shrinkable, not fixed: a longer label must give way, not overflow */
    flex: 0 1 auto;
    margin-inline-start: auto;
    min-height: 40px; padding-inline: var(--s-4);
    border: var(--line-w-1) solid var(--signal);
    border-radius: var(--radius-sm);
    color: var(--signal-ink); text-decoration: none;
    font-size: var(--text-sm); font-weight: 600;
    /* Must survive a longer translation without pushing the burger off-screen:
       it may shrink and wrap, but never truncates meaningful text. */
    min-inline-size: 0; text-align: center; text-wrap: balance; line-height: 1.2;
  }
}
@media (max-width: 400px) {
  .header-cta { padding-inline: var(--s-3); font-size: var(--text-xs); }
}

/* ---------- command palette ---------- */
.kbd {
  display: none; align-items: center; gap: 6px;
  min-height: 44px; min-width: 44px; padding: 0 12px; flex: none;
  justify-content: center;
  border: var(--line-w-1) solid var(--line); border-radius: var(--radius);
  background: none; color: var(--ink-3); cursor: pointer;
}
.kbd:hover { color: var(--ink); border-color: var(--line-strong); }
.kbd:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
/* Shown only when scripting is available, and decided before first paint by the
   inline bootstrap, so the header never reflows once the palette wires up. */
@media (min-width: 961px) and (pointer: fine) { html.js .kbd { display: inline-flex; } }

.palette {
  inline-size: min(560px, 92vw);
  padding: 0; margin-block-start: 12vh;
  border: var(--line-w-1) solid var(--line-strong); border-radius: var(--radius-lg);
  background: var(--bg-elev); color: var(--ink);
}
.palette::backdrop { background: rgba(0, 0, 0, 0.62); }
.palette__input {
  inline-size: 100%; border: 0; border-bottom: var(--line-w-1) solid var(--line);
  background: none; color: var(--ink); font: inherit; font-size: var(--text-md);
  padding: var(--s-4) var(--s-5); outline: none;
}
.palette__list { list-style: none; margin: 0; padding: var(--s-2); max-block-size: 46vh; overflow: auto; }
.palette__list a {
  display: flex; align-items: center; gap: var(--s-3);
  padding: var(--s-3); border-radius: var(--radius);
  color: var(--ink-2); text-decoration: none; font-size: var(--text-base);
}
.palette__list i { color: var(--ink-3); font-style: normal; min-inline-size: 32px; }
.palette__list li[data-selected] a { background: var(--signal-soft); color: var(--ink); }
.palette__list a:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: -2px; }
.palette__hint { margin: 0; border-top: var(--line-w-1) solid var(--line); padding: var(--s-3) var(--s-5); color: var(--ink-3); }


/* ---------- case filters: counts and empty state ---------- */
.filter-count { margin-left: 6px; color: var(--ink-3); font-size: var(--text-xs); }
button[aria-pressed='true'] .filter-count { color: inherit; }
.cases-empty {
  grid-column: 1 / -1;
  border: var(--line-w-1) dashed var(--line-strong);
  border-radius: var(--radius);
  padding: var(--s-7) var(--s-5);
  text-align: center;
  color: var(--ink-2);
}
.cases-empty strong { display: block; color: var(--ink); margin-bottom: var(--s-2); }

/* ---------- responsibility layers (no longer a numbered process) ---------- */
.stages { list-style: none; margin: var(--s-6) 0 0; padding: 0; border-top: var(--line-w-1) solid var(--line); }
.stages li {
  display: grid;
  grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
  gap: var(--s-5);
  align-items: baseline;
  padding: var(--s-4) 0;
  border-bottom: var(--line-w-1) solid var(--line);
}
.stages strong { font-size: var(--text-md); font-weight: 640; letter-spacing: -0.012em; }
.stages span { color: var(--ink-2); font-size: var(--text-sm); }
@media (max-width: 640px) {
  .stages li { grid-template-columns: 1fr; gap: 2px; }
}


/* ============================================================
   VIEW TRANSITIONS — card -> case
   ============================================================
   Native, zero bytes of JavaScript, and a no-op in browsers that do not
   support it: navigation still happens, just without the morph. Disabled
   entirely under prefers-reduced-motion.
   ============================================================ */
@media (prefers-reduced-motion: no-preference) {

  /* The card title and the case H1 share a name, so the browser morphs one
     into the other instead of cross-fading the whole page. */
  .case-card__title { view-transition-name: var(--vt-name, none); }
  .case-detail__title { view-transition-name: var(--vt-name, none); }

  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation-duration: 180ms;
    animation-timing-function: cubic-bezier(0.2, 0, 0.2, 1);
  }
}


/* ============================================================
   CALM PASS — softer surfaces, quieter rules, more air
   ============================================================
   The previous pass optimised for "precise technical document" and landed on
   "raw". Structure is now carried by rhythm and soft surfaces; hairlines are
   used only where they separate items inside one group.
   ============================================================ */

:root { --space: clamp(72px, 9vw, 128px); }

/* Cards and panels: one soft surface, no hard outline. */
.trust-points li,
.case-card,
.brief,
.scope-wizard,
.faq details {
  border: 0;
  border-radius: var(--radius);
  background: var(--bg-elev);
  box-shadow: var(--shadow);
}
.trust-points li { padding: var(--s-5); }
.trust-points { display: grid; gap: var(--s-4); list-style: none; margin: 0; padding: 0; }
.trust-points h3 { margin-bottom: var(--s-2); }
.trust-points p { color: var(--ink-2); margin: 0; }

/* The case grid was a wireframe of 1px boxes; now separate cards with air. */
.case-grid {
  border-top: 0;
  gap: var(--s-5);
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr));
}
.case-card { border-right: 0; border-bottom: 0; overflow: hidden; }
.case-card__link { transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease; }
.case-card:hover { box-shadow: 0 2px 4px rgba(0,0,0,.06), 0 18px 40px -24px rgba(0,0,0,.35); }
@media (prefers-reduced-motion: no-preference) {
  .case-card:hover .case-card__link { transform: translateY(-2px); }
}

/* Flow diagram: rounded ends, softer separators, readable roles. */
.flow { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.flow__node { border: 0; border-left: 3px solid var(--line-strong); background: var(--bg-elev); }
.flow__node:last-child { border-right: 0; }
.flow__node + .flow__node { box-shadow: inset 1px 0 0 var(--line); }
.flow__node::after { display: none; }
.routes__tabs { border: 0; background: var(--bg-elev); border-radius: var(--radius); padding: 4px; gap: 2px; box-shadow: var(--shadow); }
.routes__tab { border: 0; border-radius: var(--radius-sm); }
.routes__tab[aria-selected='true'] { background: var(--bg); color: var(--ink); box-shadow: var(--shadow); }
.routes__stage { border-top: 0; padding-top: var(--s-6); }

/* Legend: solid swatches instead of thin lines that vanished on both themes. */
.routes__legend i { inline-size: 10px; block-size: 10px; border-radius: 3px; }
.routes__legend span { color: var(--ink-2); text-transform: none; letter-spacing: 0.02em; font-family: var(--font); font-size: var(--text-sm); }

/* Sticky rail: quieter, no numbers, no hard frame. */
.rail { border-block: 0; box-shadow: 0 1px 0 var(--line); background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(8px); }
@media (max-width: 860px) {
  /* Opaque on mobile: at this size a heading scrolling underneath showed
     through the translucent strip and both became hard to read. */
  .rail { background: var(--bg); backdrop-filter: none; }
}
.rail a { border-right: 0; padding-inline: var(--s-4); }
.rail a[aria-current='true'] { box-shadow: none; color: var(--ink); font-weight: 600; }

/* The brief sheet reads as a document, so keep its internal rules but soften. */
.brief__head { border-bottom: var(--line-w-1) solid var(--line); background: none; }
.brief__row { border-bottom: var(--line-w-1) solid var(--line); }
.brief__row:last-child { border-bottom: 0; }

/* ScopeMap options: touchable rows, not a table of hairlines. */
.scope-options { border-top: 0; gap: var(--s-2); }
.scope-option { border-bottom: 0; border-radius: var(--radius-sm); }
.scope-option label { padding: var(--s-4); border-radius: var(--radius-sm); }
.scope-option label:hover { background: var(--bg-sunken); }
.scope-option:has(input:checked) label { background: var(--signal-soft); }

/* Entry points in the hero: rows with air rather than a ruled table. */
.entries { border-top: 0; }
.entry + .entry { border-top: var(--line-w-1) solid var(--line); }

/* Responsibility layers keep their rules — they group a list, not a page. */
.stages { border-top: 0; }
.stages li:last-child { border-bottom: 0; }


/* Language switch and theme toggle live inside the nav element: on desktop they
   are the last items of the header row, on mobile they travel into the drawer.
   Keeping them as header siblings overflowed a 390px viewport once the
   persistent CTA arrived. */
.main-nav { align-items: center; }
@media (max-width: 960px) {
  .main-nav .language-switch,
  .main-nav .theme-toggle { margin-block-start: var(--s-4); }
  .main-nav .language-switch { justify-content: flex-start; }
}

/* Case header meta: role and NDA, not the internal lifecycle status. */
.case-detail__nda {
  border: var(--line-w-1) solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 1px 8px;
}

/* ---------- case page rhythm ----------
   The generic --space (up to 128px) is tuned for the long home page. On a case
   page the blocks are short, so the same spacing reads as emptiness rather than
   air, and the eye has to travel between unrelated fragments. */
.case-detail { padding-block: var(--s-6) var(--s-8); }
.case-section { padding-block: var(--s-7); }
.case-section + .case-section { border-top: var(--line-w-1) solid var(--line); }
.case-section__body > *:first-child { margin-top: 0; }
.case-section__head h2, .case-mobile-disclosure > summary h2 { line-height: 1.15; }

/* A section whose body is a single short paragraph does not need a full-height
   two-column split. */
.case-section__grid { align-items: start; }
.case-stack { padding-block: var(--s-7); }

/* Long Russian compounds ("Ограничения и неизвестные") need a slightly wider
   rail, otherwise balancing strands a single conjunction on its own line. */
@media (min-width: 961px) {
  .case-section__grid { grid-template-columns: minmax(280px, 3.4fr) minmax(0, 8fr); }
  .case-section__head h2, .case-mobile-disclosure > summary h2 { font-size: clamp(1.3rem, 1.6vw, 1.6rem); }
}


/* ---------- case "at a glance" ----------
   Four short facts on one even row. The values are short by schema contract
   (short / role / duration / result), so equal cells cannot become lopsided. */
.case-facts {
  margin: var(--s-7) 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 0;
  border-top: var(--line-w-1) solid var(--line);
  border-bottom: var(--line-w-1) solid var(--line);
}
.case-facts__item {
  padding: var(--s-5) var(--s-5) var(--s-5) 0;
  display: grid;
  gap: var(--s-2);
  align-content: start;
  min-width: 0;
}
.case-facts__item + .case-facts__item { box-shadow: inset 1px 0 0 var(--line); padding-left: var(--s-5); }
.case-facts dt { color: var(--ink-3); margin: 0; }
.case-facts dd { margin: 0; color: var(--ink); font-size: var(--text-sm); line-height: 1.5; }

@media (max-width: 720px) {
  .case-facts { grid-template-columns: 1fr; }
  .case-facts__item { padding: var(--s-4) 0; }
  .case-facts__item + .case-facts__item { box-shadow: inset 0 1px 0 var(--line); padding-left: 0; }
}

/* Responsibility rows reuse the layer list, so the two read as one system. */
.case-section .stages { margin-top: 0; }
.case-section .stages dt { margin: 0; }
.case-section .stages dd { margin: 0; }


/* ---------- services: routes -> services -> outcome ---------- */
.routes-map { display: grid; gap: var(--s-8); margin-top: var(--s-7); }
.routes-map__head {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between;
  gap: var(--s-3) var(--s-5);
  padding-bottom: var(--s-4);
  border-bottom: var(--line-w-1) solid var(--line);
}
.routes-map__head h3 { margin: 0; font-size: var(--text-xl); letter-spacing: -0.015em; }
.routes-map__outcome { margin: 0; color: var(--ink); font-size: var(--text-sm); display: flex; gap: var(--s-2); align-items: baseline; }
.routes-map__outcome .mono { color: var(--ink-3); }
.routes-map__list {
  list-style: none; margin: var(--s-5) 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: var(--s-4);
}
.routes-map__list a {
  display: grid; gap: var(--s-2); align-content: start;
  height: 100%; padding: var(--s-5);
  border-radius: var(--radius); background: var(--bg-elev); box-shadow: var(--shadow);
  color: inherit; text-decoration: none;
  transition: background-color 160ms ease, transform 160ms ease;
}
.routes-map__list a:hover { background: var(--bg-sunken); }
@media (prefers-reduced-motion: no-preference) {
  .routes-map__list a:hover { transform: translateY(-2px); }
}
.routes-map__list .mono { color: var(--ink-3); }
.routes-map__list strong { font-size: var(--text-md); font-weight: 620; line-height: 1.3; letter-spacing: -0.01em; }
.routes-map__go { color: var(--signal-ink); font-size: var(--text-sm); margin-top: var(--s-2); }
.routes-map__go::after { content: ' →'; }

/* ---------- about: a real vertical track ----------
   The old markup relied on overriding a horizontal timeline, so the dots became
   block elements between entries and the rail was never drawn at all. */
.track { list-style: none; margin: var(--s-6) 0 0; padding: 0 0 0 var(--s-6); border-left: 2px solid var(--line); }
.track__item { position: relative; padding: 0 0 var(--s-7) 0; }
.track__item:last-child { padding-bottom: 0; }
.track__item::before {
  content: '';
  position: absolute;
  inset-inline-start: calc(var(--s-6) * -1 - 6px);
  inset-block-start: 6px;
  inline-size: 10px; block-size: 10px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 4px var(--bg);
}
.track__period { display: block; color: var(--ink-3); margin-bottom: var(--s-2); }
.track__item h3 { margin: 0 0 var(--s-2); font-size: var(--text-md); }
.track__item p { margin: 0; color: var(--ink-2); max-width: 62ch; }


/* ---------- product path: a chain, not a table ----------
   Eight equal columns gave each label about 100px, so long Russian labels ran
   into their neighbours. Chips wrap and always keep their own space. */
.path {
  list-style: none;
  margin: var(--s-5) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s-2) var(--s-3);
}
.path__step {
  display: inline-flex;
  align-items: center;
  padding: var(--s-2) var(--s-4);
  border-radius: var(--radius);
  background: var(--bg-elev);
  box-shadow: var(--shadow);
  font-size: var(--text-sm);
  color: var(--ink);
  white-space: nowrap;
}
.path__sep { color: var(--ink-3); font-size: var(--text-sm); user-select: none; }
.path__step:last-child { color: var(--role-out); font-weight: 620; }
@media (max-width: 560px) {
  .path__step { white-space: normal; }
}

/* Contact cards size to their content: stretching the shorter one left a large
   empty area under the QR code. */
.contact-page__grid { align-items: start; }
.contact-page__card { border: 0; box-shadow: var(--shadow); }
.contact-page__qr { margin-top: var(--s-5); align-items: flex-start; }

/* ============================================================
   SIGNAL — the one moving thing on the site
   ============================================================
   A route is a path a task travels, so when a route is chosen its nodes light
   up in sequence, left to right. Transform and opacity only, ~250ms, and it
   reinforces the content instead of decorating around it.
   Entirely off under prefers-reduced-motion: the diagram is fully readable
   without a single frame of animation.
   ============================================================ */
@media (prefers-reduced-motion: no-preference) {
  .routes__panel:not([hidden]) .flow__node {
    animation: signal-in 320ms cubic-bezier(0.22, 0.61, 0.36, 1) both;
  }
  .routes__panel:not([hidden]) .flow__node:nth-child(1) { animation-delay: 0ms; }
  .routes__panel:not([hidden]) .flow__node:nth-child(2) { animation-delay: 70ms; }
  .routes__panel:not([hidden]) .flow__node:nth-child(3) { animation-delay: 140ms; }
  .routes__panel:not([hidden]) .flow__node:nth-child(4) { animation-delay: 210ms; }

  @keyframes signal-in {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: none; }
  }

  /* The accent edge of the "my work" nodes brightens as the signal passes. */
  .routes__panel:not([hidden]) .flow__node[data-role='work'] {
    animation: signal-in 320ms cubic-bezier(0.22, 0.61, 0.36, 1) both,
               signal-edge 900ms ease-out both;
  }
  @keyframes signal-edge {
    0%   { border-left-color: var(--line-strong); }
    35%  { border-left-color: var(--signal); }
    100% { border-left-color: var(--role-work); }
  }
}

/* A hint appears next to the choice that triggered it, quiet enough that it
   informs without competing with the question. */
.scope-hint {
  margin: var(--s-4) 0 0;
  padding: var(--s-3) var(--s-4);
  border-left: 2px solid var(--signal);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--signal-soft);
  color: var(--ink-2);
  font-size: var(--text-sm);
  line-height: 1.5;
  max-width: 62ch;
}

/* ---------- expertise catalogue ---------- */
.expertise-nav { border-block: var(--line-w-1) solid var(--line); }
.expertise-nav__in { display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-4); padding-block: var(--s-4); }
.expertise-nav a {
  color: var(--ink-2); text-decoration: none; font-size: var(--text-sm);
  padding: var(--s-2) 0; min-height: 44px; display: inline-flex; align-items: center;
}
.expertise-nav a:hover { color: var(--signal-ink); }

.expertise { padding-block: var(--space); }
.expertise__group + .expertise__group { margin-top: var(--s-8); }
.expertise__group h2 { margin-bottom: var(--s-5); scroll-margin-block-start: 120px; }
.expertise__list {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 330px), 1fr));
  gap: var(--s-4);
}
.expertise-card {
  display: grid; gap: var(--s-3); align-content: start;
  padding: var(--s-5);
  border-radius: var(--radius);
  background: var(--bg-elev);
  box-shadow: var(--shadow);
}
.expertise-card__head { display: flex; gap: var(--s-4); align-items: flex-start; justify-content: space-between; }
.expertise-card__head h3 { margin: 0; font-size: var(--text-md); line-height: 1.3; }
.expertise-card p { margin: 0; color: var(--ink-2); font-size: var(--text-sm); line-height: 1.5; max-width: none; }
.expertise-card__stack { display: flex; flex-wrap: wrap; gap: var(--s-2); color: var(--ink-3); margin-top: auto; }
.expertise-card__stack span { border: var(--line-w-1) solid var(--line); border-radius: var(--radius-sm); padding: 1px 7px; }

/* The same three-segment scale the ScopeMap result uses: one visual language
   for "how much work is this", and it reads identically in both themes.
   Stars were rejected deliberately — a five-star row means quality, and this
   measures complexity. */
.scale--sm { flex: none; margin: 4px 0 0; }
.scale--sm i { inline-size: 14px; block-size: 5px; }

.routes-map__more { margin: var(--s-7) 0 0; }

/* Email as the second contact channel. */
/* Contact channels: one row per channel instead of a headed block each.
   The whole row opens the channel — the link stretches over it with ::after —
   while the copy button stays above that overlay as the one secondary action. */
.channels { list-style: none; margin: var(--s-6) 0 0; padding: 0; display: grid; gap: var(--s-2); }
.channel {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-3) var(--s-4);
  border-radius: var(--radius);
  background: var(--bg-sunken);
  transition: background var(--dur) var(--ease);
}
.channel:hover { background: var(--bg); }
.channel:has(.channel__go:focus-visible) { outline: var(--line-w-2) solid var(--signal-ink); outline-offset: 2px; }
.channel__icon { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; background: var(--bg-elev); color: var(--signal-ink); }
.channel__icon svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.channel__body { display: grid; gap: 1px; min-width: 0; }
.channel__go { font-size: var(--text-sm); font-weight: 600; color: var(--ink); text-decoration: none; justify-self: start; }
.channel__go::after { content: ''; position: absolute; inset: 0; border-radius: inherit; }
.channel__go:focus-visible { outline: none; }
.channel:hover .channel__go { color: var(--signal-ink); }
.channel__value { font-size: 12px; color: var(--ink-3); overflow-wrap: anywhere; }
.channel__arrow { color: var(--ink-3); font-size: var(--text-sm); transition: transform var(--dur) var(--ease), color var(--dur) var(--ease); }
.channel:hover .channel__arrow { color: var(--signal-ink); transform: translateX(2px); }
.channel__copy {
  position: relative; z-index: 1;
  display: grid; place-items: center;
  width: 40px; height: 40px;
  border: var(--line-w-1) solid var(--line); border-radius: var(--radius-sm);
  background: var(--bg-elev); color: var(--ink-2); cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.channel__copy svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.channel__copy:hover { color: var(--signal-ink); border-color: var(--signal-ink); }
/* Confirmation sits on the button that was pressed, so the eye does not travel. */
.channel__copy::after {
  content: attr(data-copied-label);
  position: absolute; inset-block-end: calc(100% + 6px); inset-inline-end: 0;
  padding: 3px 8px; border-radius: var(--radius-sm);
  background: var(--ink); color: var(--bg);
  font-size: 11px; white-space: nowrap;
  opacity: 0; transform: translateY(3px); pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.channel__copy[data-state='copied'] { color: var(--signal-ink); border-color: var(--signal-ink); }
.channel__copy[data-state='copied']::after { opacity: 1; transform: translateY(0); }

/* The QR is a fallback, not a headline: collapsed until someone wants it. */
.contact-page__qr-wrap { margin-top: var(--s-5); }
.contact-page__qr-wrap > summary { font-size: var(--text-sm); color: var(--ink-2); cursor: pointer; list-style: none; display: inline-flex; align-items: flex-start; gap: var(--s-2); }
.contact-page__qr-wrap > summary::-webkit-details-marker { display: none; }
.contact-page__qr-wrap > summary::before { content: '+'; display: grid; place-items: center; width: 20px; height: 20px; border: var(--line-w-1) solid var(--line); border-radius: var(--radius-sm); font-size: 13px; line-height: 1; }
.contact-page__qr-wrap[open] > summary::before { content: '\2212'; }
.contact-page__qr-wrap > summary:hover { color: var(--signal-ink); }
.contact-page__qr-wrap .contact-page__qr { margin-top: var(--s-4); }

@media (max-width: 480px) {
  .channel { padding: var(--s-3); gap: var(--s-2); }
  .channel__arrow { display: none; }
  .channel__value { font-size: 11px; }
}
.contact-form__actions { display: flex; flex-wrap: wrap; gap: var(--s-3); }
@media (max-width: 560px) {
  .contact-form__actions .btn { width: 100%; justify-content: center; }
}