/* ========================================================================== */
/* БАЗОВАЯ СИСТЕМА                                                            */
/* ========================================================================== */
:root {
  /* Переходные алиасы сохраняют текущую композицию до этапа переноса страниц. */
  --page: min(calc(100vw - var(--page-side-padding) - var(--page-side-padding)), var(--container-max));
  --header-h: 92px;
  --radius: 3px;
  /* Старые имена ссылаются на каноническую шкалу из design-system.css. */
  --space-1: var(--ds-space-2);
  --space-2: var(--ds-space-4);
  --space-3: var(--ds-space-5);
  --space-4: var(--ds-space-6);
  /* Промежуточный шаг 40 px остаётся одним токеном до миграции локальных секций. */
  --space-5: 40px;
  --space-6: var(--ds-space-7);
  --space-8: var(--ds-space-8);
  --section-pad: clamp(var(--ds-space-8), 7svh, var(--section-padding-y-desktop));
  --media-tile-h: clamp(220px, 28svh, 300px);
  --media-feature-h: clamp(300px, 42svh, 420px);
  --copy-measure: 68ch;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 128px; }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-family-primary);
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
}

body.menu-open,
html.dialog-open { overflow: hidden; }

img,
video { max-width: 100%; }
a { color: inherit; text-decoration: none; }
button,
input,
textarea { font: inherit; }
button { color: inherit; }
h1,
h2,
h3,
p,
figure { margin-top: 0; }

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 4px;
}

/* ========================================================================== */
/* ПОСТОЯННАЯ ШАПКА                                                           */
/* ========================================================================== */
.site-header {
  position: fixed;
  z-index: 80;
  top: 10px;
  left: 10px;
  right: 10px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(18px, 3.2vw, 54px);
  border: 1px solid rgba(255,255,255,.62);
  border-radius: 14px;
  background: rgba(238,241,245,.48);
  -webkit-backdrop-filter: blur(24px) saturate(118%);
  backdrop-filter: blur(24px) saturate(118%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.72), 0 12px 34px rgba(17,18,20,.07);
  transition: background .3s ease, border-color .3s ease, box-shadow .3s ease;
}

.site-header:hover,
.site-header:focus-within {
  border-color: rgba(255,255,255,.96);
  background: rgba(255,255,255,.95);
  box-shadow: inset 0 1px 0 #fff, 0 16px 44px rgba(17,18,20,.11);
}

.site-header.is-scrolled { background: rgba(245,247,249,.84); }
.brand { display: flex; align-items: center; align-self: stretch; flex: 0 0 auto; }
.brand__logo { display: block; width: 162px; height: auto; max-height: 78px; object-fit: contain; }
.nav { display: flex; align-items: center; gap: clamp(14px, 1.55vw, 26px); font-size: 13px; }
.nav a { position: relative; white-space: nowrap; opacity: .64; transition: opacity .2s ease; }
.nav a:hover,
.nav a[aria-current="page"] { opacity: 1; }
.nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -8px;
  height: 1px;
  background: currentColor;
}

.nav__contact,
.primary-button,
.text-button {
  box-sizing: border-box;
  height: var(--control-height);
  min-height: var(--control-height);
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--control-icon-gap);
  padding: 0 var(--control-padding-x);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--ink);
  color: white;
  cursor: pointer;
  font-size: var(--control-font-size);
  font-weight: var(--control-font-weight);
  transition: transform .2s ease, color .2s ease, background .2s ease;
}

.nav__contact { min-height: var(--control-height); }
.nav__contact:hover,
.primary-button:hover { transform: translateY(-2px); color: var(--color-white); background: var(--color-wet-asphalt-strong); }
.text-button { border-color: var(--color-wet-asphalt); background: var(--color-wet-asphalt); color: var(--color-white); }
.text-button:hover { transform: translateY(-2px); }
.menu-toggle,
.menu-close { display: none; }
.nav-backdrop { display: none; }

/* ========================================================================== */
/* ОБЩАЯ ТИПОГРАФИКА И КОМПОНОВКА                                            */
/* ========================================================================== */
.section-shell { width: var(--page); margin: 0 auto; }
.editorial-section,
.tech-section {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: var(--section-pad) 0;
}
.section-shell > *,
.split-copy > *,
.media-copy-grid > * { min-width: 0; }
.eyebrow {
  margin: 0 0 24px;
  color: inherit;
}

.display-heading {
  width: 100%;
  max-width: 1220px;
  margin: 0;
  /* Слова переносятся только по естественным границам. Масштаб T-DISPLAY-M
     адаптируется container query, поэтому аварийное дробление русских слов не нужно. */
  overflow-wrap: normal;
  word-break: normal;
  hyphens: manual;
}

.display-heading span,
.metal-text { color: var(--metal); }
.service-note { color: var(--muted); }
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: var(--control-height);
  min-height: var(--control-height);
  padding: 0 14px;
  border: 1px solid var(--color-wet-asphalt);
  border-radius: var(--radius);
  background: var(--color-wet-asphalt);
  color: var(--color-white);
  box-shadow: none;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.text-link:hover { border-color: var(--color-wet-asphalt-strong); background: var(--color-wet-asphalt-strong); color: var(--color-white); transform: translateY(-2px); }
.section-dark .text-link { border-color: var(--color-wet-asphalt); background: var(--color-wet-asphalt); color: var(--color-white); }
.section-dark .text-link:hover { border-color: var(--color-wet-asphalt-strong); background: var(--color-wet-asphalt-strong); }
.text-link span,
.primary-button span,
.text-button span { transition: transform .2s ease; }
.text-link:hover span,
.primary-button:hover span,
.text-button:hover span { transform: translate(4px, -4px); }
.section-link { margin-top: var(--space-3); }
.button-row { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-4); }

.split-copy { display: grid; grid-template-columns: minmax(0, 1fr) minmax(340px, .72fr); gap: clamp(40px, 6vw, 96px); align-items: start; }
.split-copy__body { padding-top: var(--space-5); }
.split-copy__body > p { max-width: 650px; }
.split-copy__body .text-link,
.split-copy__body > .primary-button { margin-top: 24px; }
.oversize-note { margin: var(--space-6) 0 var(--space-4); color: var(--metal); }
.text-block { padding: var(--space-2) 0 var(--space-3); border-top: 1px solid var(--line); }
.text-block:last-child { border-bottom: 1px solid var(--line); }
.text-block h3 { margin-bottom: 12px; }
.text-block p { max-width: 660px; margin-bottom: 0; color: var(--color-copy-secondary); }
.system-copy p { color: var(--color-copy-secondary); }

.reveal { opacity: 0; transform: translateY(32px); transition: opacity .82s cubic-bezier(.2,.7,.2,1), transform .82s cubic-bezier(.2,.7,.2,1); }
.reveal.is-visible { opacity: 1; transform: none; }

/* ========================================================================== */
/* HERO С ПРОЦЕДУРНЫМИ ОБЛАКАМИ                                              */
/* ========================================================================== */
.hero {
  position: relative;
  isolation: isolate;
  min-height: 100vh;
  padding: 150px max(4vw, calc((100vw - 1440px) / 2)) 72px;
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  grid-template-rows: auto 1fr auto;
  gap: 30px;
  overflow: hidden;
}

.hero > canvas { position: absolute; inset: 0; z-index: 0; width: 100%; height: 100%; pointer-events: none; }
.hero__grid {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(13,14,16,.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(13,14,16,.032) 1px, transparent 1px),
    radial-gradient(circle at 72% 43%, rgba(74,98,117,.18), transparent 35%);
  background-size: 72px 72px, 72px 72px, auto;
  mask-image: linear-gradient(to bottom, black 0%, black 78%, transparent 100%);
}

.hero__copy,
.hero-object { position: relative; z-index: 2; }
.hero__copy { grid-column: 1; align-self: start; opacity: 1; transform: none; }
.hero h1 {
  max-width: 900px;
  margin: 0;
}
.hero h1 span { color: #6f7881; }
.hero__lead { width: min(520px, 92%); margin: 34px 0 0; color: #3f454b; }

/* Главная фраза появляется каскадом и остаётся в финальном состоянии после анимации. */
@keyframes hero-copy-enter {
  from { opacity: 0; transform: translateY(26px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero__copy .eyebrow,
.hero__copy h1,
.hero__lead { animation: hero-copy-enter 1.08s cubic-bezier(.2,.72,.2,1) both; }
.hero__copy h1 { animation-delay: .16s; }
.hero__lead { animation-delay: .34s; }
.hero-object {
  grid-column: 2;
  grid-row: 1 / span 2;
  min-height: 620px;
  align-self: center;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: zoom-in;
}
.hero-object__image {
  display: block;
  width: min(134%, 984px);
  height: auto;
  transform: translate(5%, 1%);
  filter: drop-shadow(0 36px 40px rgba(17,18,20,.25));
  transition: transform .4s ease;
}
.hero-object:hover .hero-object__image { transform: translate(5%, -1%) scale(1.015); }

/* ========================================================================== */
/* ГЛАВНАЯ СТРАНИЦА                                                          */
/* ========================================================================== */
.responsibility {
  background-image: linear-gradient(rgba(13,14,16,.018) 1px, transparent 1px), linear-gradient(90deg, rgba(13,14,16,.018) 1px, transparent 1px);
  background-size: 90px 90px;
}
.responsibility__statement { margin: var(--space-6) 0 0 30%; }
.responsibility__statement p { margin: 0; }
.responsibility__details { max-width: 650px; margin: var(--space-5) 0 0 30%; }
.responsibility__details > p:not(.lead-line) { color: #4e555c; }
.responsibility__details .text-link { margin-top: 22px; }
.integration-copy { background: var(--paper); }
.result-section { background: #e5eaf0; }
.result-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: var(--space-6); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.result-card {
  min-height: 330px;
  display: grid;
  grid-template-rows: 20px 80px minmax(100px, 1fr) auto;
  padding: var(--space-3);
  border-right: 1px solid var(--line);
}
.result-card:last-child { border-right: 0; }
.result-card > span { color: var(--muted); }
.result-card h3 { align-self: end; margin: 0 0 var(--space-2); }
.result-card p { align-self: center; margin: var(--space-2) 0; color: #525960; }
.result-card strong { align-self: end; display: block; margin: 0; }
.future-visual {
  position: relative;
  height: clamp(220px, 30svh, 300px);
  margin-top: var(--space-4);
  overflow: hidden;
  border: 1px solid var(--line);
  background-image: linear-gradient(rgba(13,14,16,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(13,14,16,.04) 1px, transparent 1px), radial-gradient(circle at 50% 40%, rgba(168,205,232,.36), transparent 42%);
  background-size: 64px 64px, 64px 64px, auto;
}
.future-visual::before,
.future-visual::after,
.future-visual span { content: ""; position: absolute; border: 1px solid rgba(80,93,104,.25); }
.future-visual::before { inset: 18% 52% 18% 8%; border-radius: 46% 18% 18% 46%; }
.future-visual::after { inset: 18% 8% 18% 52%; border-radius: 18% 46% 46% 18%; background: rgba(168,205,232,.14); }
.future-visual span:first-child { left: 50%; top: 10%; bottom: 10%; }
.future-visual span:last-child { left: 8%; right: 8%; top: 50%; }
.future-visual--tall { height: clamp(220px, 30svh, 300px); }
.production-section { background: var(--paper); }
.production-layout { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); margin-top: var(--space-5); align-items: start; }
.production-media { display: grid; grid-template-columns: 1fr; gap: 0; align-content: start; background: transparent; }
.production-media .image-card { min-height: 190px; }
.production-media .image-card--large { min-height: 300px; }
.start-section { background: #dce2e8; }
.start-layout { display: grid; grid-template-columns: 1.25fr .75fr; gap: clamp(60px, 8vw, 130px); align-items: end; }
.start-layout__body { max-width: 520px; padding-bottom: 10px; }
.start-layout__body .primary-button { margin: 22px 0; }

/* ========================================================================== */
/* ИЗОБРАЖЕНИЯ И ВИДЕО                                                       */
/* ========================================================================== */
.image-card {
  position: relative;
  width: 100%;
  min-height: var(--media-tile-h);
  display: block;
  overflow: hidden;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: #d9dfe5;
  cursor: zoom-in;
}
.image-card img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform .55s cubic-bezier(.2,.7,.2,1); }
.image-card:hover img { transform: scale(1.025); }
.image-card--portrait img { object-fit: contain; background: #e2e6ea; }
.video-frame { margin: 0; overflow: visible; background: transparent; }
.video-frame video { display: block; width: 100%; aspect-ratio: 16 / 9; border: 0; object-fit: cover; background: transparent; }
.video-frame--wide video { aspect-ratio: 4 / 3; object-fit: contain; }
.gallery-item figcaption { margin: 0; padding: 14px 2px 0; color: var(--muted); }
.gallery-grid { display: grid; gap: 0; margin-top: var(--space-5); background: transparent; }
.gallery-grid--three { grid-template-columns: repeat(3, 1fr); }
.gallery-grid--four { grid-template-columns: repeat(4, 1fr); }
.gallery-item { margin: 0; padding-bottom: 16px; background: inherit; }
.gallery-item .image-card { height: var(--media-tile-h); }

/* ========================================================================== */
/* СТРАНИЦА ПРОДУКЦИИ                                                        */
/* ========================================================================== */
.product-subnav {
  position: fixed;
  z-index: 70;
  top: 112px;
  left: 50%;
  width: min(90vw, 880px);
  display: flex;
  justify-content: center;
  gap: 24px;
  padding: 13px 22px;
  border: 1px solid rgba(255,255,255,.72);
  border-radius: 999px;
  background: rgba(247,248,250,.88);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  box-shadow: 0 12px 35px rgba(13,14,16,.09);
  font-size: 11px;
  transform: translate(-50%, -20px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease, transform .3s ease;
}
.product-subnav.is-visible { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }
.product-subnav a { white-space: nowrap; scroll-snap-align: start; opacity: .65; }
.product-subnav a:hover { opacity: 1; }
.product-subnav::-webkit-scrollbar { display: none; }
.product-hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(340px, .82fr);
  align-items: center;
  padding-top: 116px;
  background: radial-gradient(circle at 79% 48%, rgba(188,198,207,.62), transparent 31%), var(--bg);
}
.product-hero__copy { z-index: 2; align-self: center; padding: 64px 2vw 64px max(4vw, calc((100vw - 1440px) / 2)); }
.product-hero h1,
.page-hero h1,
.contact-page h1 {
  margin: 0;
}
.product-hero h1 span,
.page-hero h1 span,
.contact-page h1 span { color: var(--metal); }
.product-hero__copy > p:not(.eyebrow) { max-width: 680px; color: #444b52; }
.product-hero__copy .body-lead { margin-top: 42px; }
.product-hero__media {
  position: relative;
  width: min(31vw, 470px);
  aspect-ratio: 4 / 3;
  justify-self: center;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: zoom-in;
  overflow: visible;
}
.product-hero__media::before { display: none; }
.product-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  mix-blend-mode: multiply;
  filter: saturate(.72) contrast(.94) drop-shadow(0 24px 34px rgba(22,25,28,.13));
  -webkit-mask-image: radial-gradient(ellipse 76% 72% at 50% 50%, #000 50%, rgba(0,0,0,.92) 66%, transparent 100%);
  mask-image: radial-gradient(ellipse 76% 72% at 50% 50%, #000 50%, rgba(0,0,0,.92) 66%, transparent 100%);
}
.section-contrast { background: #e1e6eb; }
.section-dark { background: var(--dark); color: white; }
.section-dark .display-heading span { color: #747e88; }
.section-dark .eyebrow,
.section-dark .gallery-item figcaption { color: #9199a1; }
.section-dark .image-card { background: #1b1e22; }
.section-intro > .body-lead { max-width: 760px; margin: var(--space-4) 0 0 30%; }
.system-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: var(--space-6); margin-top: var(--space-5); align-items: center; }
.system-grid .video-frame { width: min(100%, 460px); justify-self: center; }
.layer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0; margin-top: var(--space-5); background: transparent; }
.layer-card { padding: 0 0 var(--space-3); background: var(--bg); }
.layer-card .image-card { height: clamp(200px, 24svh, 240px); min-height: 0; }
.layer-card > span,
.layer-card h3,
.layer-card p { display: block; margin-left: 34px; margin-right: 34px; }
.layer-card > span { margin-top: var(--space-3); color: var(--muted); }
.layer-card h3 { margin-top: var(--space-2); margin-bottom: 12px; }
.layer-card p { max-width: 540px; color: #515860; }
.thickness-feature { display: grid; grid-template-columns: 1fr 1fr; min-height: 0; margin-top: 1px; background: var(--paper); }
.thickness-feature > div { display: flex; flex-direction: column; justify-content: center; padding: var(--space-4); }
.thickness-feature p { max-width: 520px; color: #50575f; }
.thickness-feature strong { display: block; margin: var(--space-4) 0 0; white-space: nowrap; }
.thickness-feature strong small { font-size: .18em; letter-spacing: 0; }
.thickness-feature > div > span { margin-top: 30px; color: var(--muted); }

/* На широком экране описание двух слоёв и толщина образуют один экранный модуль. */
@media (min-width: 1024px) {
  .layers-section .section-shell {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr);
    column-gap: 0;
    align-items: stretch;
  }
  .layers-section .section-intro { grid-column: 1 / -1; }
  .layers-section .layer-grid { grid-column: 1; margin-top: var(--space-5); }
  .layers-section .thickness-feature {
    grid-column: 2;
    grid-template-columns: 1fr;
    grid-template-rows: minmax(200px, 1fr) auto;
    margin-top: var(--space-5);
  }
  .layers-section .thickness-feature .image-card { height: 100%; min-height: 0; }
}
.flexibility-section { background: var(--paper); }
.flexibility-section .video-frame {
  width: min(30vw, 400px);
  margin: var(--space-5) auto 0;
}
.neck-copy { max-width: 760px; margin: var(--space-4) 0 0 30%; color: #b1b7bd; }
.specification-grid { display: grid; grid-template-columns: .5fr 1fr 1fr; gap: var(--space-5); margin-top: var(--space-4); padding: var(--space-3) 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.specification-grid > p { color: #50575f; }
.specification-grid ul,
.delivery-section ul,
.mockup-copy ul { margin: 0; padding-left: 1.2em; line-height: 1.8; }
.media-copy-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(40px, 6vw, 88px); align-items: center; }
.media-copy-grid--reverse { grid-template-columns: .92fr 1.08fr; }
.media-copy-grid .image-card { height: var(--media-feature-h); min-height: 0; }
.media-copy-grid > div p { max-width: var(--copy-measure); color: #b1b7bd; }
.media-copy-grid--reverse > div p { color: #4d545b; }
.pickup-section { overflow: hidden; background: linear-gradient(135deg, var(--bg), #e3e8ed); }
.pickup-layout {
  min-height: min(720px, calc(100svh - 128px));
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  grid-template-rows: auto 1fr;
  column-gap: 24px;
  row-gap: 46px;
  align-items: start;
}
.pickup-copy { position: relative; z-index: 2; grid-column: 1 / 8; grid-row: 1; }
.pickup-copy .display-heading { max-width: 850px; }
.pickup-copy .body-lead { max-width: 650px; margin: 40px 0 0; color: #535b63; }
.pickup-notes { position: relative; z-index: 2; grid-column: 1 / 6; grid-row: 2; align-self: end; max-width: 590px; }
.pickup-notes p { margin: 0 0 18px; color: #4c535a; }
.pickup-object,
.pickup-detail {
  position: relative;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: zoom-in;
}
.pickup-object { z-index: 3; grid-column: 8 / 11; grid-row: 1 / 3; align-self: end; justify-self: center; width: 100%; }
.pickup-object img { display: block; width: 100%; max-height: min(62svh, 580px); object-fit: contain; filter: drop-shadow(0 28px 38px rgba(24,28,31,.2)); }
.pickup-detail { z-index: 1; grid-column: 11 / 13; grid-row: 1 / 3; align-self: center; width: 100%; height: min(54svh, 500px); overflow: hidden; }
.pickup-detail img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: 44% center; filter: saturate(.74) contrast(.96); }
.conditions-section { min-height: 100vh; display: flex; align-items: center; overflow: hidden; color: white; background: #201d13; }
.conditions-section__background { position: absolute; inset: 0; background-image: linear-gradient(90deg, rgba(11,13,16,.97) 0%, rgba(11,13,16,.83) 48%, rgba(11,13,16,.38) 100%), var(--media-source, url('/assets/media/fuel-background.webp')); background-position: center; background-size: cover; background-repeat: no-repeat; filter: saturate(.45); }
.conditions-content { position: relative; z-index: 1; }
.conditions-content > p { max-width: 680px; color: #c2c7cc; }
.conditions-content .body-lead { color: white; }
.temperature { display: block; margin: var(--space-5) 0 var(--space-3); }
.mockup-grid { display: grid; grid-template-columns: .8fr .6fr .6fr; gap: 0; margin-top: var(--space-4); background: transparent; }
.mockup-copy { padding: var(--space-3); background: var(--paper); }
.mockup-grid .image-card { height: var(--media-tile-h); min-height: 0; }
.prototype-copy { max-width: 980px; margin: var(--space-4) 0 0; padding-top: var(--space-3); border-top: 1px solid var(--line); }
.prototype-copy h3 { margin: 12px 0 var(--space-3); }
.prototype-copy h3 span { color: var(--metal); }
.prototype-copy p { max-width: 820px; color: #4d545b; }
.testing-section { background: #d6dde4; }
.pressure-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0; margin-top: var(--space-5); background: transparent; }
.pressure-card { min-height: 290px; padding: var(--space-4); display: flex; flex-direction: column; background: #e4e8ec; }
.pressure-card strong small { font-size: .18em; letter-spacing: 0; }
.pressure-card p { max-width: 560px; margin: auto 0 0; }
.testing-note { max-width: 900px; margin: var(--space-4) 0 0 30%; color: #495159; }
.delivery-section { background: var(--paper); }

/* ========================================================================== */
/* ВНУТРЕННИЕ СТРАНИЦЫ                                                       */
/* ========================================================================== */
.page-hero { padding: 220px 0 130px; }
.page-hero--compact { min-height: 72vh; display: flex; align-items: flex-end; }
.faq-section { padding: 0 0 140px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary { position: relative; padding: 36px 80px 36px 0; cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 12px; top: 50%; color: var(--metal); font-size: 36px; font-weight: 400; transform: translateY(-50%); }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { max-width: 760px; margin: 0 0 40px 34%; color: #4d545b; }
.about-hero { min-height: 100vh; display: flex; align-items: center; padding-top: 110px; background: linear-gradient(135deg, #eef1f5, #d9dfe5); }
.about-hero__layout { display: grid; grid-template-columns: 1fr 1fr; align-items: end; gap: 80px; }
.about-hero__logo { display: block; width: min(100%, 880px); height: auto; object-fit: contain; object-position: left center; }
.about-hero__lead { max-width: 620px; margin: 0 0 28px; }
.about-story { background: var(--paper); }
.about-engineering { background: #dce2e8; }
.contact-page { min-height: 100vh; display: flex; align-items: center; padding: 150px 0 90px; background: linear-gradient(135deg, #eef1f5, #dbe2e8); }
.contact-page__layout { display: grid; grid-template-columns: 1.2fr .8fr; gap: 100px; align-items: end; }
.contact-page__body { max-width: 560px; padding-bottom: 20px; }
.contact-page__facts { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin: 42px 0; background: var(--line); }
.contact-page__facts span { min-height: 110px; display: flex; align-items: flex-end; padding: 18px; background: rgba(255,255,255,.56); }
.contact-details { padding: 70px 0 120px; background: var(--dark); color: white; }
.contact-details__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.contact-details p:not(.eyebrow) { max-width: 620px; color: #aab1b8; }

/* ========================================================================== */
/* ПОДВАЛ                                                                     */
/* ========================================================================== */
.site-footer { padding: 38px 0 52px; border-top: 1px solid var(--line); background: var(--bg); }
.footer-layout { width: var(--page); margin: 0 auto; display: grid; grid-template-columns: 1fr auto auto; gap: 50px; align-items: end; }
.footer-layout p,
.footer-layout a { margin: 0; color: var(--muted); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; }
.footer-links { display: flex; flex-wrap: wrap; gap: 22px; }
.footer-links a:hover { color: var(--ink); }

/* ========================================================================== */
/* PHOTOSWIPE V5 / ЕДИНЫЙ ПОЛНОЭКРАННЫЙ ПРОСМОТР                             */
/* ========================================================================== */
.bts-photoswipe {
  --pswp-bg: #111418;
  --pswp-icon-color: #ffffff;
  --pswp-icon-color-secondary: #cbd2d8;
  --pswp-error-text-color: #ffffff;
  z-index: 1000;
  font-family: var(--font-family-primary);
}
.bts-photoswipe .pswp__top-bar { background: linear-gradient(to bottom, rgba(11,13,16,.74), transparent); }
.bts-photoswipe .pswp__counter { height: var(--control-height); padding: 0 var(--control-padding-x); display: flex; align-items: center; font-size: var(--control-font-size); font-weight: var(--control-font-weight); opacity: .92; }
.bts-photoswipe .pswp__button { width: var(--control-height); height: var(--control-height); }
.bts-photoswipe .pswp__button--arrow { width: 64px; height: 64px; margin-top: -32px; border-radius: 50%; background-color: rgba(11,13,16,.54); }
.bts-photoswipe .pswp__button--arrow:hover { background-color: rgba(11,13,16,.82); }
.bts-photoswipe .pswp__button[hidden] { display: none !important; }

/* Нативный dialog остаётся только у формы обратной связи. */
.contact-dialog { width: 100vw; max-width: none; height: 100dvh; max-height: none; margin: 0; padding: 0; border: 0; background: transparent; overflow: hidden; }
.contact-dialog::backdrop { background: rgba(9,11,13,.44); -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); }
.dialog-close {
  position: absolute;
  z-index: 4;
  top: 22px;
  right: 22px;
  width: var(--control-height);
  height: var(--control-height);
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--color-wet-asphalt);
  border-radius: 50%;
  background: var(--color-wet-asphalt);
  color: var(--color-white);
  cursor: pointer;
  font-size: 30px;
  line-height: 1;
  transition: transform .2s ease, background .2s ease;
}
.dialog-close:hover { transform: rotate(5deg); background: var(--color-wet-asphalt-strong); }

/* ========================================================================== */
/* ВЫЕЗЖАЮЩАЯ ФОРМА ОБРАТНОЙ СВЯЗИ                                           */
/* ========================================================================== */
.contact-dialog { display: none; justify-content: flex-end; }
.contact-dialog[open] { display: flex; }
.contact-dialog__shell {
  position: relative;
  width: min(760px, 100vw);
  height: 100%;
  overflow-y: auto;
  padding: 78px clamp(28px, 5vw, 70px) 46px;
  background: rgba(244,246,248,.96);
  -webkit-backdrop-filter: blur(28px);
  backdrop-filter: blur(28px);
  box-shadow: -30px 0 70px rgba(13,14,16,.16);
  transform: translateX(102%);
  transition: transform .48s cubic-bezier(.2,.78,.2,1);
}
.contact-dialog.is-open .contact-dialog__shell { transform: translateX(0); }
.contact-dialog.is-closing .contact-dialog__shell { transform: translateX(102%); }
.contact-dialog__header h2 { margin: 0; }
.contact-dialog__header h2 span { color: var(--metal); }
.contact-dialog__header > p:last-child { max-width: 520px; margin: 24px 0 0; color: #50575f; }
.contact-form { margin-top: 46px; }
.contact-form__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.contact-field { display: grid; gap: 9px; }
.contact-field strong,
.contact-methods strong { color: #8f3d3d; }
.contact-field input,
.contact-field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.58);
  color: var(--ink);
  transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
}
.contact-field input { height: 52px; padding: 0 14px; }
.contact-field textarea { min-height: 132px; padding: 14px; resize: vertical; }
.contact-field input:focus,
.contact-field textarea:focus { outline: 0; border-color: var(--accent-strong); background: white; box-shadow: 0 0 0 3px rgba(101,159,201,.16); }
.contact-field--wide,
.contact-methods { grid-column: 1 / -1; }
.contact-methods { min-width: 0; margin: 0; padding: 0; border: 0; }
.contact-methods__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 9px; }
.contact-methods__hint { margin: 8px 0 0; color: var(--muted); }
.contact-methods.has-error .contact-methods__hint { color: #984444; }
.contact-methods.has-error input { border-color: #a84f4f; }
.contact-form__footer { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: end; margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--line); }
.contact-form__footer p { max-width: 340px; margin: 0; color: var(--muted); }
.contact-form__status { min-height: 20px; margin: 14px 0 0; color: #4d738e; }

/* ========================================================================== */
/* АДАПТИВ                                                                    */
/* ========================================================================== */
@media (max-width: 1023px) {
  .nav { gap: 13px; font-size: 11px; }
  .nav__contact { padding-inline: var(--control-padding-x); }
  .brand__logo { width: 148px; }
  .product-subnav {
    width: calc(100vw - 36px);
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    justify-content: flex-start;
    scroll-snap-type: inline proximity;
    scrollbar-width: none;
  }
}

@media (max-width: 1023px) {
  :root { --header-h: 80px; --page: 90vw; }
  .site-header { padding-inline: 18px; }
  .brand__logo { width: 132px; max-height: 64px; }
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 13px;
    border: 1px solid rgba(13,14,16,.12);
    border-radius: var(--radius);
    background: var(--color-wet-asphalt);
    color: var(--color-white);
    cursor: pointer;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
  }
  .menu-toggle::after { content: ""; width: 24px; height: 10px; border-top: 1px solid currentColor; border-bottom: 1px solid currentColor; }
  .nav {
    position: fixed;
    z-index: 91;
    top: 8px;
    right: 8px;
    width: min(430px, calc(100vw - 16px));
    height: calc(100dvh - 16px);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: 0;
    padding: 80px 34px 34px;
    overflow-y: auto;
    border-radius: 14px;
    background: rgba(248,249,250,.98);
    transform: translateX(110%);
    transition: transform .38s cubic-bezier(.2,.78,.2,1);
  }
  .nav.is-open { transform: translateX(0); }
  .menu-close {
    position: absolute;
    top: 20px;
    right: 20px;
    height: var(--control-height);
    min-height: var(--control-height);
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 0 14px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--color-wet-asphalt);
    color: var(--color-white);
    cursor: pointer;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
  }
  .menu-close span { font-size: 20px; font-weight: 400; line-height: 1; }
  .nav a { padding: 15px 0; border-bottom: 1px solid var(--line); font-size: 28px; font-weight: 700; letter-spacing: -.04em; opacity: 1; }
  .nav a[aria-current="page"]::after { display: none; }
  .nav__contact { margin-top: 32px; min-height: var(--control-height); }
  .nav-backdrop { position: fixed; z-index: 79; inset: 0; display: block; background: rgba(9,11,13,.36); opacity: 0; pointer-events: none; transition: opacity .3s ease; }
  .nav-backdrop.is-visible { opacity: 1; pointer-events: auto; }
  .split-copy,
  .start-layout,
  .production-layout,
  .system-grid,
  .media-copy-grid,
  .media-copy-grid--reverse,
  .contact-page__layout,
  .about-hero__layout { grid-template-columns: 1fr; }
  .split-copy__body { padding-top: 0; }
  .responsibility__statement,
  .responsibility__details,
  .section-intro > .body-lead,
  .neck-copy,
  .prototype-copy,
  .testing-note,
  .faq-item p { margin-left: 0; }
  .result-grid { grid-template-columns: 1fr; }
  .result-card { min-height: 340px; grid-template-rows: 22px 92px minmax(96px, 1fr) auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .result-card:last-child { border-bottom: 0; }
  .production-media .image-card--large { min-height: 300px; }
  .product-hero { grid-template-columns: 1fr; background: radial-gradient(circle at 50% 82%, rgba(188,198,207,.52), transparent 32%), var(--bg); }
  .product-hero__copy { padding: 140px 5vw 42px; }
  .product-hero__copy .body-lead { margin-top: 34px; }
  .product-hero__media { width: min(68vw, 440px); min-height: 0; margin: 0 auto 70px; }
  .layer-grid,
  .thickness-feature,
  .specification-grid,
  .pressure-grid { grid-template-columns: 1fr; }
  .thickness-feature .image-card { min-height: 460px; }
  .gallery-grid--four { grid-template-columns: 1fr 1fr; }
  .flexibility-section .video-frame { width: min(58vw, 420px); }
  .pickup-layout { min-height: auto; grid-template-columns: 1fr; grid-template-rows: auto; row-gap: 48px; }
  .pickup-copy,
  .pickup-notes,
  .pickup-object,
  .pickup-detail { grid-column: 1; grid-row: auto; }
  .pickup-object { width: min(48vw, 390px); justify-self: center; }
  .pickup-object img { max-height: 620px; }
  .pickup-notes { max-width: 680px; align-self: auto; }
  .pickup-detail { width: min(86vw, 720px); height: min(52vw, 440px); justify-self: end; }
  .mockup-grid { grid-template-columns: 1fr 1fr; }
  .mockup-copy { grid-column: 1 / -1; }
  .contact-details__grid { grid-template-columns: 1fr; }
}

@media (max-width: 767px) {
  :root {
    --header-h: 72px;
    --page: calc(100vw - var(--page-side-padding) - var(--page-side-padding));
    --section-pad: 64px;
    --media-tile-h: 280px;
    --media-feature-h: 320px;
  }
  .site-header { top: 6px; left: 6px; right: 6px; padding: 0 14px; border-radius: 12px; }
  .brand__logo { width: 112px; max-height: 56px; }
  .hero { min-height: auto; padding: 112px 5vw 58px; grid-template-columns: 1fr; grid-template-rows: auto; gap: 20px; }
  .hero__lead { width: 100%; margin-top: 26px; }
  .hero-object { grid-column: 1; grid-row: auto; min-height: 330px; }
  .hero-object__image { width: 118%; transform: translate(1%, 0); }
  .hero-object:hover .hero-object__image { transform: translate(1%, 0); }
  .editorial-section,
  .tech-section { min-height: auto; padding: var(--section-pad) 0; }
  .split-copy { gap: 42px; }
  .responsibility__statement { margin-top: 90px; }
  .responsibility__details { margin-top: 46px; }
  .oversize-note { margin-block: 48px 34px; }
  .result-grid { margin-top: 60px; }
  .result-card { min-height: 320px; grid-template-rows: 22px 76px minmax(108px, 1fr) auto; padding: 24px 20px; }
  .result-card h3 { margin-bottom: 16px; }
  .result-card p { margin: 18px 0; }
  .future-visual,
  .future-visual--tall { height: 240px; margin-top: var(--space-4); }
  .production-media { grid-template-columns: 1fr; }
  .production-media .image-card--large { grid-column: auto; min-height: 360px; }
  .product-subnav { top: 90px; padding: 11px 16px; }
  .product-hero { min-height: auto; padding-top: 0; }
  .product-hero__copy { padding: 116px 5vw 34px; }
  .product-hero__copy .body-lead { margin-top: 28px; }
  .product-hero__media { width: min(76vw, 360px); min-height: 0; margin-bottom: 48px; }
  .section-intro > .body-lead { margin-top: 38px; }
  .layer-card .image-card { height: auto; min-height: 0; aspect-ratio: 4 / 3; }
  .layer-card > span,
  .layer-card h3,
  .layer-card p { margin-left: 22px; margin-right: 22px; }
  .thickness-feature > div { padding: 36px 24px; }
  .thickness-feature strong { margin-top: 35px; white-space: nowrap; }
  .gallery-grid--three,
  .gallery-grid--four { grid-template-columns: 1fr; }
  .gallery-item .image-card { height: auto; min-height: 0; aspect-ratio: 4 / 3; }
  .specification-grid { gap: 24px; }
  .media-copy-grid .image-card { height: auto; min-height: 0; aspect-ratio: 4 / 3; }
  .flexibility-section .video-frame { width: min(74vw, 320px); margin-top: 48px; }
  .pickup-layout { row-gap: 38px; }
  .pickup-copy .body-lead { margin-top: 30px; }
  .pickup-object { width: min(72vw, 330px); }
  .pickup-object img { max-height: 560px; }
  .pickup-detail { width: 100%; height: auto; aspect-ratio: 16 / 10; }
  .mockup-grid { grid-template-columns: 1fr; }
  .mockup-copy { grid-column: auto; padding: 28px 22px; }
  .mockup-grid .image-card { height: auto; min-height: 0; aspect-ratio: 4 / 3; }
  .pressure-card { min-height: 350px; padding: 28px 22px; }
  .about-hero { min-height: 82vh; }
  .about-hero__logo { width: 100%; max-width: 560px; }
  .page-hero { padding-top: 160px; }
  .faq-item summary { padding: 28px 54px 28px 0; }
  .contact-page { padding-top: 130px; }
  .contact-page__facts { grid-template-columns: 1fr; }
  .footer-layout { grid-template-columns: 1fr; gap: 24px; }
  .footer-links { gap: 14px; }
  .contact-dialog__shell { width: calc(100vw - 12px); height: calc(100dvh - 12px); margin: 6px; padding: 72px 22px 28px; border-radius: 14px; }
  .contact-form__grid,
  .contact-methods__grid,
  .contact-form__footer { grid-template-columns: 1fr; }
  .contact-form__footer .c-button--wide-mobile { width: 100%; }
  .dialog-close { top: 14px; right: 14px; width: var(--control-height); height: var(--control-height); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
  .hero__copy .eyebrow,
  .hero__copy h1,
  .hero__lead { animation: none !important; }
}