:root {
  --ink: #202828;
  --ink-soft: #556060;
  --paper: #f4f6f5;
  --white: #ffffff;
  --line: #d8dddd;
  --red: #ed2633;
  --cyan: #00aede;
  --green: #168f55;
  --max: 1280px;
  --gutter: clamp(1.25rem, 4vw, 4.5rem);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 6rem; overflow-x: clip; }
body {
  margin: 0;
  max-width: 100%;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 1rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
:focus-visible { outline: 3px solid var(--cyan); outline-offset: 4px; }
.container { width: calc(100% - (var(--gutter) * 2)); max-width: var(--max); margin-inline: auto; }
.skip { position: fixed; left: 1rem; top: -5rem; z-index: 100; padding: .75rem 1rem; background: var(--white); }
.skip:focus { top: 1rem; }

.header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: 5.25rem;
  border-bottom: 1px solid rgba(255,255,255,.22);
  background: rgba(23,30,30,.88);
  color: var(--white);
  backdrop-filter: blur(14px);
}
.header-inner { height: 100%; display: flex; align-items: center; gap: 2rem; }
.logo { flex: 0 0 auto; width: 9rem; padding: .35rem .55rem; background: var(--white); }
.logo img { width: 100%; height: auto; }
#navigation { display: flex; align-items: center; gap: clamp(1.25rem, 2.5vw, 2.75rem); margin-left: auto; }
#navigation a { font-size: .875rem; letter-spacing: .035em; }
#navigation a:hover { color: #8ddff3; }
.header-actions { display: flex; align-items: center; gap: 1rem; }
.languages { display: flex; gap: .35rem; font-size: .75rem; letter-spacing: .08em; }
.languages a:not([aria-current]) { opacity: .55; }
.languages a:hover { opacity: 1; }
.header-contact { display: inline-flex; align-items: center; gap: .6rem; min-height: 2.75rem; padding: 0 1rem; border: 1px solid rgba(255,255,255,.35); font-size: .8rem; font-weight: 700; }
.header-contact:hover { background: var(--white); color: var(--ink); }
.header-contact svg, .button svg { width: 1.15rem; height: 1.15rem; }
.menu { display: none; width: 2.75rem; height: 2.75rem; padding: .75rem; border: 1px solid rgba(255,255,255,.35); background: transparent; color: inherit; }
.menu span { display: block; height: 1px; margin: .3rem 0; background: currentColor; transition: transform .2s ease; }

.hero { position: relative; min-height: 100svh; display: grid; align-items: end; overflow: hidden; background: #1f2929; color: var(--white); }
.hero::before { content: ''; position: absolute; inset: 0; z-index: 1; background: linear-gradient(90deg, rgba(12,18,18,.87) 0%, rgba(12,18,18,.57) 48%, rgba(12,18,18,.08) 78%), linear-gradient(0deg, rgba(12,18,18,.72), transparent 44%); }
.hero::after { content: ''; position: absolute; inset: 0; z-index: 1; background: linear-gradient(115deg, transparent 67%, rgba(0,174,222,.2) 67.1%, transparent 67.8%); pointer-events: none; }
.hero-photo { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 58% center; }
.hero-content { position: relative; z-index: 2; padding-top: 10rem; padding-bottom: 9.5rem; }
.eyebrow { max-width: 100%; margin: 0 0 1.4rem; color: inherit; font-size: .75rem; font-weight: 700; letter-spacing: .13em; overflow-wrap: anywhere; text-transform: uppercase; }
.status-dot { display: inline-block; width: .5rem; height: .5rem; margin-right: .65rem; border-radius: 50%; background: var(--red); box-shadow: 0 0 0 .32rem rgba(237,38,51,.2); }
.hero h1 { max-width: 9ch; margin: 0; font-size: clamp(4.75rem, 11vw, 10.5rem); font-weight: 800; line-height: .8; letter-spacing: -.075em; }
.hero h1 span { display: block; margin-top: 1.2rem; color: rgba(255,255,255,.76); font-size: clamp(.85rem, 1.3vw, 1.2rem); font-weight: 600; line-height: 1; letter-spacing: .22em; text-transform: uppercase; }
.hero-lead { max-width: 37rem; margin: 2.25rem 0; font-size: clamp(1.25rem, 2.2vw, 2rem); line-height: 1.3; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: .8rem; min-height: 3.25rem; padding: .8rem 1.25rem; border: 1px solid transparent; font-size: .85rem; font-weight: 700; transition: transform .2s ease, background .2s ease, color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button.white { background: var(--white); color: var(--ink); }
.button.dark { background: var(--ink); color: var(--white); }
.button.green { background: var(--green); color: var(--white); }
.hero-bottom { position: absolute; bottom: 2rem; left: 50%; z-index: 2; display: flex; justify-content: space-between; align-items: center; transform: translateX(-50%); color: rgba(255,255,255,.72); font-size: .8rem; letter-spacing: .04em; }
.hero-bottom a { display: grid; place-items: center; width: 3rem; height: 3rem; border: 1px solid rgba(255,255,255,.35); border-radius: 50%; }

.section { padding-block: clamp(5rem, 10vw, 9rem); }
.section-grid { display: grid; grid-template-columns: minmax(10rem, .55fr) 1.45fr; gap: var(--gutter); }
.section-grid > *, .catalog-heading > *, .process-grid > *, .contact-grid > *, .footer-grid > *, .product-intro > *, .product-information > * { min-width: 0; }
.section h2, .catalog h2, .process h2, .contact-band h2, .related > h2 { margin: 0; font-size: clamp(2.35rem, 5vw, 5.4rem); line-height: .98; letter-spacing: -.05em; }
.large-copy { max-width: 43rem; margin: 2rem 0 0; color: var(--ink-soft); font-size: clamp(1.15rem, 2vw, 1.55rem); line-height: 1.55; }
.principles { display: grid; grid-template-columns: repeat(3,1fr); margin-top: clamp(3rem, 7vw, 6rem); border-top: 1px solid var(--line); }
.principles > div { min-height: 13rem; padding: 1.5rem; border-right: 1px solid var(--line); position: relative; }
.principles > div:first-child { border-left: 1px solid var(--line); }
.principles span { color: var(--red); font-size: .72rem; letter-spacing: .1em; }
.principles h3 { max-width: 13rem; margin: 3.75rem 0 0; font-size: 1.2rem; font-weight: 600; line-height: 1.25; }
.principles > div > span:last-child { position: absolute; right: 1.5rem; bottom: 1.5rem; color: var(--ink); }

.catalog { background: var(--white); }
.catalog-heading { display: grid; grid-template-columns: 1.35fr .65fr; align-items: end; gap: var(--gutter); }
.catalog-heading > p:last-child { max-width: 22rem; margin: 0 0 .6rem auto; color: var(--ink-soft); font-size: 1.1rem; }
.catalog-note { max-width: 46rem; margin: 2rem 0 3rem; padding-left: 1rem; border-left: 2px solid var(--cyan); color: var(--ink-soft); }
.product-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.product-card { min-width: 0; background: var(--white); transition: transform .25s ease, box-shadow .25s ease; }
.product-card:hover { position: relative; z-index: 2; transform: translateY(-6px); box-shadow: 0 18px 40px rgba(22,30,30,.12); }
.card-photo { position: relative; aspect-ratio: 1.55; overflow: hidden; background: #dce2e1; }
.card-photo::after { content: ''; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(16,23,23,.5), transparent 55%); }
.card-photo img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.45); transition: transform .45s ease, filter .3s ease; }
.product-card:hover img { transform: scale(1.035); filter: saturate(.8); }
.card-number, .demo-label { position: absolute; z-index: 1; top: 1rem; color: var(--white); font-size: .68rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.card-number { left: 1rem; }
.demo-label { right: 1rem; padding: .3rem .5rem; background: rgba(20,28,28,.72); }
.product-card.red .demo-label { background: rgba(190,28,39,.86); }
.product-card.cyan .demo-label { background: rgba(0,132,169,.88); }
.card-content { min-height: 17rem; display: flex; flex-direction: column; padding: 1.5rem; }
.category { margin: 0 0 1rem; color: var(--red); font-size: .7rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.cyan .category { color: #007a9c; }
.graphite .category { color: var(--ink-soft); }
.card-content h3 { margin: 0; font-size: clamp(1.35rem, 2.2vw, 2rem); line-height: 1.08; letter-spacing: -.035em; }
.card-description { color: var(--ink-soft); font-size: .95rem; }
.card-bottom { display: flex; justify-content: space-between; margin-top: auto; padding-top: 1rem; border-top: 1px solid var(--line); font-size: .8rem; font-weight: 700; }

.process { padding-block: clamp(4rem, 8vw, 7rem); background: var(--ink); color: var(--white); }
.process-grid { display: grid; grid-template-columns: .55fr 1fr .65fr; gap: var(--gutter); align-items: start; }
.process h2 { font-size: clamp(2rem, 4vw, 4.25rem); }
.process p:last-child { margin: 0; color: #b8c0c0; }

.contact-band { padding-block: clamp(4.5rem, 8vw, 7rem); background: var(--cyan); color: #09252c; }
.contact-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: var(--gutter); align-items: end; }
.contact-band h2 { max-width: 10ch; }
.contact-band p:not(.eyebrow) { max-width: 38rem; margin: 1.5rem 0 0; font-size: 1.1rem; }
.contact-action { display: flex; flex-direction: column; align-items: flex-start; gap: .8rem; }
.contact-action .button { width: 100%; min-height: 4rem; }
.phone { font-size: clamp(1.45rem, 3vw, 2.3rem); font-weight: 700; letter-spacing: -.03em; }
.contact-action > span { font-size: .82rem; text-transform: uppercase; letter-spacing: .08em; }

.footer { padding: 4rem 0 1.5rem; background: #161d1d; color: #d7dddd; }
.footer-grid { display: grid; grid-template-columns: .8fr 1fr 1.1fr; gap: var(--gutter); }
.footer-logo { width: 10rem; padding: .45rem .6rem; background: var(--white); }
.footer h3 { margin: 0 0 1rem; color: var(--white); font-size: 1rem; }
.footer p { color: #9fa9a9; font-size: .86rem; }
.requisites { border-top: 1px solid #3a4444; }
.requisites summary { display: flex; justify-content: space-between; padding: 1rem 0; cursor: pointer; color: var(--white); font-weight: 700; list-style: none; }
.requisites summary::-webkit-details-marker { display: none; }
.requisites[open] summary span { transform: rotate(45deg); }
.requisites dl { margin: 0; }
.requisites dt { margin-top: .8rem; color: #7f8c8c; font-size: .65rem; letter-spacing: .08em; text-transform: uppercase; }
.requisites dd { margin: .15rem 0; font-size: .82rem; overflow-wrap: anywhere; }
.footer-bottom { display: flex; justify-content: space-between; margin-top: 3rem; padding-top: 1.25rem; border-top: 1px solid #313b3b; color: #7f8c8c; font-size: .75rem; }
.floating-contact { position: fixed; right: max(1rem, env(safe-area-inset-right)); bottom: max(1rem, env(safe-area-inset-bottom)); z-index: 40; display: grid; place-items: center; width: 3.75rem; height: 3.75rem; border-radius: 50%; background: var(--green); color: var(--white); box-shadow: 0 12px 32px rgba(0,0,0,.25); transition: transform .2s ease; }
.floating-contact:hover { transform: scale(1.08); }
.floating-contact svg { width: 1.65rem; height: 1.65rem; }

.product-page { padding: 8rem 0 7rem; background: var(--paper); }
.back-link { display: inline-flex; margin: 1.5rem 0 3rem; color: var(--ink-soft); font-size: .85rem; font-weight: 700; }
.product-intro { display: grid; grid-template-columns: .9fr 1.1fr; min-height: 38rem; background: var(--white); }
.product-intro > div { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; padding: clamp(2rem, 5vw, 5rem); }
.product-intro h1 { max-width: 100%; margin: 0; font-size: clamp(3rem, 6.5vw, 6.75rem); line-height: .88; letter-spacing: -.065em; hyphens: auto; overflow-wrap: break-word; }
.product-intro .large-copy { margin-bottom: 2rem; font-size: 1.1rem; }
.product-intro figure { position: relative; margin: 0; min-height: 28rem; overflow: hidden; background: #dbe0df; }
.product-intro figure img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.55); }
.product-intro figcaption { position: absolute; right: 1rem; bottom: 1rem; padding: .35rem .55rem; background: rgba(19,26,26,.78); color: white; font-size: .68rem; text-transform: uppercase; }
.product-information { display: grid; grid-template-columns: 1.4fr .6fr; gap: var(--gutter); padding-block: clamp(4rem, 8vw, 7rem); }
.product-information article > .large-copy { margin: 0 0 4rem; color: var(--ink); }
.information-columns { display: grid; grid-template-columns: repeat(2,1fr); gap: 2rem; }
.product-information h2 { margin: 0 0 1.25rem; font-size: 1rem; text-transform: uppercase; letter-spacing: .06em; }
.product-information ul { margin: 0 0 3rem; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.product-information li { padding: .85rem 0; border-bottom: 1px solid var(--line); }
.facts { display: grid; grid-template-columns: 1fr 1fr; }
.facts dt, .facts dd { margin: 0; padding: .85rem 0; border-bottom: 1px solid var(--line); }
.facts dd { text-align: right; }
.document-panel { align-self: start; padding: 2rem; background: var(--ink); color: var(--white); }
.document-panel p, .document-panel small { color: #aeb8b8; }
.document-panel .button { width: 100%; background: var(--white); color: var(--ink); }
.document-panel small { display: block; margin-top: .75rem; }
.file-symbol { display: grid; place-items: center; width: 4rem; height: 5rem; margin-bottom: 3rem; border: 1px solid #667171; font-size: .7rem; letter-spacing: .1em; }
.document-unavailable { display: block; padding: 1rem; border: 1px solid #596363; color: #aeb8b8; text-align: center; font-size: .8rem; }
.related { padding-top: 1rem; }
.related > h2 { margin-bottom: 2.5rem; font-size: clamp(2rem, 4vw, 4rem); }
.error-page { min-height: 70vh; padding-top: 11rem; }
.error-page h1 { max-width: 12ch; margin: 0 0 2rem; font-size: clamp(3rem, 8vw, 7rem); line-height: .9; }

.reveal-ready .section-grid, .reveal-ready .principles > *, .reveal-ready .catalog-heading, .reveal-ready .catalog-note, .reveal-ready .product-card, .reveal-ready .process-grid, .reveal-ready .contact-grid, .reveal-ready .product-intro, .reveal-ready .product-information, .reveal-ready .related { opacity: 0; transform: translateY(22px); transition: opacity .65s ease var(--reveal-delay,0ms), transform .65s ease var(--reveal-delay,0ms); }
.reveal-ready .is-visible { opacity: 1; transform: none; }

@media (max-width: 960px) {
  .header { height: 4.75rem; }
  .logo { width: 7.7rem; }
  .header-contact span { display: none; }
  .header-contact { width: 2.75rem; padding: 0; justify-content: center; }
  .section-grid, .catalog-heading, .contact-grid { grid-template-columns: 1fr; }
  .catalog-heading > p:last-child { margin-left: 0; }
  .product-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .process-grid { grid-template-columns: 1fr 1.4fr; }
  .process-grid p:last-child { grid-column: 2; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .requisites { grid-column: 1 / -1; }
  .product-intro { grid-template-columns: 1fr; }
  .product-intro figure { order: -1; aspect-ratio: 16/8; min-height: 0; }
  .product-information { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  :root { --gutter: 1.15rem; }
  html { scroll-padding-top: 4.75rem; }
  #navigation { position: absolute; top: 100%; right: 0; left: 0; display: flex; height: calc(100svh - 4.75rem); flex-direction: column; align-items: stretch; gap: 0; padding: 2rem var(--gutter); overflow-y: auto; background: #161d1d; visibility: hidden; opacity: 0; transform: translateY(-.75rem); transition: opacity .2s ease, transform .2s ease, visibility .2s; }
  #navigation a { padding: 1.25rem 0; border-bottom: 1px solid #394343; font-size: 1.25rem; }
  .menu-open #navigation { visibility: visible; opacity: 1; transform: none; }
  .menu { display: block; }
  .header-actions { margin-left: auto; }
  .header-contact { display: none; }
  .hero-content { padding-top: 8rem; padding-bottom: 8.5rem; }
  .hero h1 { font-size: clamp(4rem, 24vw, 7rem); }
  .hero-lead { max-width: 21rem; }
  .hero-bottom span { max-width: 15rem; }
  .section { padding-block: 4.5rem; }
  .principles { grid-template-columns: 1fr; }
  .principles > div { min-height: 9.5rem; border-left: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .principles h3 { margin-top: 2rem; }
  .product-grid { grid-template-columns: 1fr; }
  .card-content { min-height: 14.5rem; }
  .process-grid { grid-template-columns: 1fr; }
  .process-grid p:last-child { grid-column: auto; }
  .footer-grid { grid-template-columns: 1fr; }
  .requisites { grid-column: auto; }
  .footer-bottom { flex-direction: column; gap: .75rem; }
  .product-page { padding-top: 5.5rem; }
  .back-link { margin-bottom: 1.5rem; }
  .product-intro { margin-inline: calc(var(--gutter) * -1); }
  .product-intro > div { padding: 2rem var(--gutter) 2.5rem; }
  .product-intro h1 { font-size: clamp(2.25rem, 11vw, 4rem); line-height: .94; }
  .product-intro figure { aspect-ratio: 4/3; }
  .information-columns { grid-template-columns: 1fr; gap: 0; }
}

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