:root {
  --bg: #080a0c;
  --bg-soft: #0e1216;
  --panel: #12171c;
  --panel-strong: #182029;
  --text: #f5f7f8;
  --muted: #9aa6b2;
  --line: rgba(255,255,255,.1);
  --accent: #ff8a1f;
  --accent-strong: #f06d00;
  --accent-soft: #ffc078;
  --steel: #7f96a7;
  --success: #34d399;
  --max: 1120px;
  --header: 76px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background:
    radial-gradient(circle at 18% 0%, rgba(255,138,31,.12), transparent 34%),
    linear-gradient(180deg, #0b0e11 0%, #080a0c 42%, #0a0d10 100%);
  font-family: Tahoma, Verdana, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.55;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.skip-link { position: fixed; left: 10px; top: 10px; z-index: 1000; padding: 9px 12px; border-radius: 10px; background: var(--accent); color: #101010; transform: translateY(-160%); }
.skip-link:focus { transform: none; }

.site-header { position: sticky; top: 0; z-index: 100; border-bottom: 1px solid var(--line); background: rgba(8,10,12,.86); backdrop-filter: blur(16px); }
.header-inner { width: min(var(--max), calc(100% - 32px)); min-height: var(--header); margin: 0 auto; display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 14px; }
.brand { display: inline-flex; align-items: center; gap: 11px; min-width: 0; }
.brand-mark { position: relative; width: 48px; height: 34px; flex: 0 0 auto; border: 1px solid rgba(255,138,31,.7); border-radius: 8px; background: linear-gradient(135deg, transparent 0 32%, var(--accent) 32% 46%, transparent 46% 58%, var(--accent) 58% 72%, transparent 72%), #11161b; transform: skewX(-12deg); box-shadow: 0 12px 32px rgba(255,138,31,.12); }
.brand-mark::after { content: ""; position: absolute; right: -8px; top: 10px; width: 6px; height: 14px; border-radius: 99px; background: var(--accent-soft); }
.brand-text { display: grid; gap: 2px; line-height: 1; }
.brand-name { max-width: 210px; overflow: hidden; color: #fff; font: 900 24px/1 Tahoma, Verdana, Arial, sans-serif; letter-spacing: .02em; text-transform: uppercase; white-space: nowrap; }
.brand-caption { color: var(--accent-soft); font-size: 10px; font-weight: 800; text-transform: uppercase; }
.header-phone { display: inline-flex; min-height: 44px; align-items: center; gap: 9px; padding: 0 16px; border: 1px solid rgba(255,138,31,.55); border-radius: 999px; background: rgba(255,138,31,.14); color: #fff; font-size: 15px; font-weight: 900; white-space: nowrap; box-shadow: 0 12px 30px rgba(255,138,31,.1); }
.phone-dot { display: grid; width: 25px; height: 25px; place-items: center; border-radius: 50%; background: var(--accent); color: #111; font-size: 13px; }
.menu-toggle { display: inline-grid; width: 46px; height: 46px; place-items: center; border: 1px solid var(--line); border-radius: 14px; color: #fff; background: #11161b; cursor: pointer; }
.menu-bars { position: relative; width: 22px; height: 15px; }
.menu-bars::before,.menu-bars::after,.menu-bars span { content: ""; position: absolute; left: 0; width: 22px; height: 2px; border-radius: 2px; background: currentColor; transition: transform .18s ease, opacity .18s ease; }
.menu-bars::before { top: 0; }.menu-bars span { top: 6.5px; }.menu-bars::after { bottom: 0; }
body.menu-open .menu-bars::before { transform: translateY(6.5px) rotate(45deg); }
body.menu-open .menu-bars span { opacity: 0; }
body.menu-open .menu-bars::after { transform: translateY(-6.5px) rotate(-45deg); }

.nav-drawer { position: fixed; inset: 0; z-index: 99; display: grid; justify-items: end; pointer-events: none; background: rgba(0,0,0,0); transition: background .2s ease; }
body.menu-open .nav-drawer { pointer-events: auto; background: rgba(0,0,0,.58); }
.nav-panel { width: min(360px, calc(100vw - 28px)); min-height: 100%; padding: 92px 22px 28px; overflow-y: auto; border-left: 1px solid var(--line); background: linear-gradient(160deg, rgba(255,138,31,.1), transparent 38%), #0c1014; transform: translateX(110%); transition: transform .24s ease; }
body.menu-open .nav-panel { transform: translateX(0); }
.nav-list,.subnav { list-style: none; margin: 0; padding: 0; }
.nav-list { display: grid; gap: 15px; }
.nav-list > li > a,.nav-title { display: block; color: #fff; font-size: 19px; font-weight: 900; line-height: 1.12; text-transform: uppercase; }
.nav-list a:hover,.nav-list a:focus { color: var(--accent-soft); }
.subnav { display: grid; gap: 7px; margin-top: 9px; padding-left: 13px; border-left: 2px solid var(--accent); }
.subnav a { color: var(--muted); font-size: 14px; font-weight: 750; }

.section,.hero,.page-hero { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.hero { position: relative; display: grid; min-height: clamp(460px, 58svh, 560px); grid-template-columns: minmax(0,1fr) minmax(280px,.75fr); align-items: center; gap: 28px; padding: 30px 0 34px; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 12% auto auto -9%; width: min(430px, 58vw); height: 12px; border-radius: 999px; background: var(--accent); box-shadow: 0 28px 0 rgba(255,138,31,.28), 0 56px 0 rgba(255,192,120,.12); transform: skewX(-25deg); opacity: .28; }
.eyebrow,.section-kicker { display: inline-flex; align-items: center; gap: 9px; width: max-content; max-width: 100%; margin-bottom: 16px; color: var(--accent-soft); font-size: 11px; font-weight: 900; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 30px; height: 2px; background: var(--accent); }
.hero h1,.page-hero h1 { margin: 0; max-width: 720px; color: #fff; font: 900 52px/.98 Tahoma, Verdana, Arial, sans-serif; letter-spacing: -.01em; text-transform: uppercase; }
.hero h1 span,.accent { color: var(--accent); }
.hero-lead,.page-lead { max-width: 650px; margin: 16px 0 0; color: #e5e9ed; font-size: 22px; line-height: 1.28; }
.hero-sub { max-width: 590px; margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.action-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; padding: 0 20px; border: 1px solid transparent; border-radius: 12px; background: var(--accent); color: #111; font-size: 13px; font-weight: 900; text-transform: uppercase; transition: transform .16s ease, background .16s ease, border-color .16s ease; }
.button:hover,.button:focus { transform: translateY(-1px); background: var(--accent-soft); }
.button.secondary { color: #fff; border-color: var(--line); background: rgba(255,255,255,.055); }
.button.secondary:hover,.button.secondary:focus { border-color: rgba(255,138,31,.48); background: rgba(255,138,31,.12); }
.hero-note { display: grid; grid-template-columns: 42px minmax(0,1fr); gap: 12px; align-items: center; max-width: 500px; margin-top: 18px; color: #fff; font-size: 18px; font-weight: 800; }
.arrow-icon { position: relative; display: block; width: 42px; height: 18px; border-bottom: 4px solid var(--accent); border-radius: 3px; }
.arrow-icon::before,.arrow-icon::after { content: ""; position: absolute; right: -3px; width: 18px; height: 4px; border-radius: 4px; background: var(--accent); transform-origin: right center; }
.arrow-icon::before { top: 3px; transform: rotate(39deg); }.arrow-icon::after { top: 15px; transform: rotate(-39deg); }
.hero-visual { position: relative; align-self: end; }
.hero-visual img { width: min(100%, 360px); margin-left: auto; filter: drop-shadow(0 24px 55px rgba(0,0,0,.55)); }
.hero-visual::after { content: "АЗОТ"; position: absolute; right: 3%; bottom: -18px; z-index: -1; color: rgba(255,255,255,.055); font: 900 82px/1 Tahoma, sans-serif; }

.section { padding: 58px 0; }
.content-band { border-block: 1px solid var(--line); background: linear-gradient(100deg, rgba(255,138,31,.07), transparent 48%), rgba(255,255,255,.025); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 22px; margin-bottom: 24px; }
.section h2,.compact-title { margin: 0; max-width: 760px; color: #fff; font: 900 40px/1.05 Tahoma, Verdana, Arial, sans-serif; letter-spacing: -.01em; text-transform: uppercase; }
.section-copy { max-width: 570px; margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.product-grid,.service-grid,.contact-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
.product-card,.service-card,.contact-card,.info-card { position: relative; overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: linear-gradient(145deg, rgba(255,138,31,.09), transparent 36%), var(--panel); box-shadow: inset 0 1px 0 rgba(255,255,255,.04); }
.product-card { min-height: 210px; padding: 18px; }
.product-card::before { content: ""; position: absolute; right: -18px; top: 28px; width: 64px; height: 126px; border: 3px solid rgba(255,255,255,.12); border-radius: 24px 24px 13px 13px; background: linear-gradient(90deg, transparent, rgba(255,255,255,.1), transparent), linear-gradient(180deg, var(--accent), #2b333b 38%, #151a1f); opacity: .45; transform: rotate(9deg); }
.product-card.featured { border-color: rgba(255,138,31,.38); background: linear-gradient(140deg, rgba(255,138,31,.18), transparent 44%), #15130f; }
.product-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 20px; }
.product-name { margin: 0; color: #fff; font-size: 20px; line-height: 1.08; }
.product-volume { display: inline-flex; min-width: 48px; min-height: 30px; align-items: center; justify-content: center; border: 1px solid var(--line); border-radius: 999px; color: var(--accent-soft); font-size: 13px; font-weight: 900; }
.price-list { display: grid; gap: 10px; margin: 0; }
.price-line { display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: end; padding-bottom: 9px; border-bottom: 1px solid rgba(255,255,255,.08); }
.price-line dt { color: var(--muted); font-size: 13px; }
.price-line dd { margin: 0; color: #fff; font-size: 20px; font-weight: 900; white-space: nowrap; }
.card-note { margin: 14px 0 0; color: var(--accent-soft); font-size: 13px; font-weight: 800; }
.benefit-strip { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 1px; margin-top: 16px; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: rgba(255,255,255,.08); }
.benefit { min-height: 96px; padding: 18px; background: #10151a; }
.benefit b { display: block; margin-bottom: 4px; color: #fff; font-size: 15px; }.benefit span { color: var(--muted); font-size: 13px; }
.service-card,.contact-card,.info-card { min-height: 170px; padding: 18px; }
.service-card h3,.contact-card h3,.info-card h3 { margin: 0 0 10px; color: #fff; font-size: 18px; line-height: 1.2; }
.service-card p,.contact-card p,.info-card p { margin: 0 0 14px; color: var(--muted); font-size: 14px; }
.text-link { color: var(--accent-soft); font-weight: 900; }.text-link:hover,.text-link:focus { color: #fff; }
.certificate-grid { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 12px; }
.certificate-card { display: grid; gap: 10px; padding: 9px; border: 1px solid var(--line); border-radius: 12px; background: #10151a; }
.certificate-card img { width: 100%; aspect-ratio: .7; object-fit: cover; object-position: top; border-radius: 8px; background: #fff; }
.certificate-card span { color: var(--muted); font-size: 12px; font-weight: 800; }
.page-hero { padding: 58px 0 34px; }
.page-hero h1 { max-width: 880px; font-size: 48px; }
.page-lead { font-size: 19px; }
.price-table { width: 100%; table-layout: fixed; border-collapse: collapse; overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
.price-table th,.price-table td { padding: 14px; border-bottom: 1px solid rgba(255,255,255,.08); text-align: left; }
.price-table th { color: var(--accent-soft); font-size: 12px; text-transform: uppercase; }.price-table td { color: #fff; font-size: 15px; font-weight: 800; }.price-table tr:last-child td { border-bottom: 0; }
.two-column { display: grid; grid-template-columns: minmax(0,.95fr) minmax(260px,.62fr); gap: 20px; align-items: start; }
.rich-text { color: #d7dde2; font-size: 15px; }.rich-text p { margin: 0 0 15px; }.rich-text ul { margin: 0; padding-left: 19px; color: var(--muted); }.rich-text li + li { margin-top: 7px; }
.legal-warning { padding: 42px 0; border-top: 1px solid rgba(255,138,31,.18); background: linear-gradient(180deg, #ff8a1f 0%, #b84d00 56%, #151515 100%); color: #201206; text-align: center; }
.legal-warning-inner { width: min(920px, calc(100% - 32px)); margin: 0 auto; }
.legal-warning strong { display: block; color: #1f1106; font-size: 30px; line-height: 1.15; font-weight: 900; }.legal-warning p { margin: 14px 0 0; color: #fff8ef; font-size: 17px; font-weight: 900; }
.site-footer { padding: 30px 0; background: #080a0c; }.footer-inner { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; display: grid; grid-template-columns: 1fr auto; gap: 18px; align-items: center; color: var(--muted); font-size: 13px; }.footer-links { display: flex; flex-wrap: wrap; gap: 12px; font-weight: 800; }.footer-links a { color: #fff; }.footer-links a:hover,.footer-links a:focus { color: var(--accent-soft); }

@media (max-width: 960px) {
  .header-inner { grid-template-columns: 1fr auto auto; }
  .header-phone { min-height: 40px; padding: 0 12px; font-size: 13px; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 32px; }
  .hero-visual { max-width: 440px; margin: -12px auto 0; }
  .product-grid,.service-grid,.contact-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .certificate-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
  .two-column { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  :root { --header: 68px; }
  body { font-size: 14px; }
  .header-inner,.section,.hero,.page-hero { width: min(100% - 24px, var(--max)); }
  .brand-mark { width: 40px; height: 29px; border-radius: 7px; }
  .brand-name { max-width: 160px; font-size: 18px; }
  .brand-caption { font-size: 8px; }
  .header-inner { gap: 8px; }
  .header-phone { min-height: 38px; padding: 0 10px; font-size: 0; border-radius: 12px; }
  .header-phone .phone-dot { margin: 0; }
  .header-phone::after { content: "8 495 414-28-55"; font-size: 12px; font-weight: 900; }
  .phone-dot { width: 22px; height: 22px; font-size: 11px; }
  .menu-toggle { width: 42px; height: 42px; border-radius: 12px; }
  .nav-panel { width: min(310px, calc(100vw - 42px)); padding: 82px 18px 24px; }
  .nav-list { gap: 13px; }
  .nav-list > li > a,.nav-title { font-size: 17px; }
  .subnav a { font-size: 13px; }
  .hero { padding: 28px 0 32px; }
  .hero h1,.page-hero h1 { max-width: 100%; font-size: 31px; line-height: 1.03; overflow-wrap: anywhere; }
  .hero-lead { margin-top: 14px; font-size: 17px; }
  .page-lead { font-size: 16px; }
  .hero-sub { font-size: 13px; }
  .action-row { display: grid; }
  .button { width: 100%; min-height: 44px; font-size: 12px; }
  .hero-note { grid-template-columns: 36px 1fr; align-items: start; font-size: 15px; }
  .arrow-icon { width: 36px; }
  .section { padding: 42px 0; }
  .section-head { display: block; margin-bottom: 20px; }
  .section h2,.compact-title { font-size: 28px; line-height: 1.08; overflow-wrap: anywhere; }
  .section-copy { font-size: 13px; }
  .hero-visual { max-width: 270px; margin: -4px auto 0; }
  .hero-visual img { width: min(100%,270px); }
  .hero-visual::after { right: 0; bottom: -8px; font-size: 44px; }
  .product-grid,.service-grid,.contact-grid,.benefit-strip,.certificate-grid { grid-template-columns: 1fr; }
  .product-card { min-height: 178px; padding: 15px; }
  .product-card::before { width: 48px; height: 96px; top: 30px; }
  .product-top { margin-bottom: 14px; }
  .product-name { font-size: 18px; }
  .price-line dd { font-size: 18px; }
  .service-card,.contact-card,.info-card { min-height: auto; padding: 15px; }
  .certificate-card img { max-height: 440px; }
  .price-table { display: block; overflow-x: auto; }
  .price-table th,.price-table td { min-width: 0; padding: 10px 8px; font-size: 13px; }
  .rich-text { font-size: 14px; }
  .footer-inner { grid-template-columns: 1fr; }
  .legal-warning strong { font-size: 22px; }
  .legal-warning p { font-size: 15px; }
}

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