/* ===========================================================
   АО «ТЭН» Великие Луки — design system
   Headings: Unbounded / Body: Golos Text
   =========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Unbounded:wght@500;600;700;800&family=Golos+Text:wght@400;500;600;700&display=swap');

:root{
  --navy-950: #060d16;
  --navy-900: #0a1522;
  --navy-800: #0f1e2e;
  --navy-700: #16293d;
  --navy-600: #1f3a54;
  --blue-500: #2f7fe5;
  --blue-600: #1f68c9;
  --blue-400: #5b9cf2;
  --ember-500: #ff6a3d;
  --ember-400: #ff8659;
  --ink-900: #10161f;
  --ink-700: #3b4451;
  --ink-500: #5f6b7a;
  --ink-300: #94a1b0;
  --mist-100: #f4f7fa;
  --mist-200: #e9edf2;
  --mist-300: #dbe2ea;
  --white: #ffffff;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 10px rgba(10, 21, 34, .06);
  --shadow-md: 0 12px 32px rgba(10, 21, 34, .10);
  --shadow-lg: 0 24px 60px rgba(10, 21, 34, .18);
  --container: 1240px;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  font-family: "Golos Text", "Segoe UI", sans-serif;
  color: var(--ink-900);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
}
img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
ul{ margin: 0; padding: 0; list-style: none; }
h1,h2,h3,h4{
  font-family: "Unbounded", "Golos Text", sans-serif;
  line-height: 1.18;
  margin: 0 0 .5em;
  letter-spacing: -0.01em;
  overflow-wrap: break-word;
  word-break: break-word;
}
p{ margin: 0 0 1em; }
button, input, select, textarea{ font-family: inherit; font-size: inherit; }

.container{
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- section helpers ---------- */
.section{ padding: 88px 0; }
.section--tight{ padding: 56px 0; }
.section--dark{ background: var(--navy-900); color: var(--white); }
.section--mist{ background: var(--mist-100); }
.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: "Unbounded", sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--blue-500);
  margin-bottom: 14px;
}
.eyebrow::before{
  content: "";
  width: 22px; height: 2px;
  background: var(--ember-500);
  display: inline-block;
  border-radius: 2px;
}
.section-head{ max-width: 640px; margin-bottom: 48px; }
.section-head h2{ font-size: clamp(28px, 3.4vw, 40px); }
.section-head p{ color: var(--ink-500); font-size: 17px; }
.section--dark .section-head p{ color: var(--ink-300); }

/* ---------- buttons ---------- */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: "Unbounded", sans-serif;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: .01em;
  padding: 15px 28px;
  border-radius: 100px;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, color .15s ease, border-color .15s ease;
  white-space: nowrap;
}
.btn:active{ transform: scale(.97); }
.btn--primary{ background: var(--blue-500); color: var(--white); box-shadow: 0 10px 24px rgba(47,127,229,.35); }
.btn--primary:hover{ background: var(--blue-600); box-shadow: 0 14px 30px rgba(47,127,229,.45); }
.btn--ghost{ background: transparent; border-color: rgba(255,255,255,.35); color: var(--white); }
.btn--ghost:hover{ border-color: var(--white); }
.btn--outline{ background: transparent; border-color: var(--mist-300); color: var(--ink-900); }
.btn--outline:hover{ border-color: var(--blue-500); color: var(--blue-600); }
.btn--ember{ background: var(--ember-500); color: var(--white); box-shadow: 0 10px 24px rgba(255,106,61,.35); }
.btn--ember:hover{ background: #e85526; }
.btn--sm{ padding: 11px 20px; font-size: 13px; }
.btn--block{ width: 100%; }

/* ---------- header ---------- */
.topbar{
  background: var(--navy-950);
  color: var(--ink-300);
  font-size: 13px;
}
.topbar .container{
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 24px;
  padding-top: 9px;
  padding-bottom: 9px;
}
.topbar a{ color: var(--ink-300); transition: color .15s; }
.topbar a:hover{ color: var(--white); }
.topbar__item{ display: inline-flex; align-items: center; gap: 7px; }

.site-header{
  background: var(--navy-900);
  color: var(--white);
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.site-header__top{
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 18px 0;
}
.brand{
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.brand img{ height: 52px; width: auto; }
.brand__text{ font-size: 13px; line-height: 1.35; color: var(--ink-300); }
.brand__text strong{ color: var(--white); font-weight: 600; display: block; }
.brand__text span{ color: var(--blue-400); }

.site-header__contacts{
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 32px;
}
.contact-block{ font-size: 14px; line-height: 1.3; }
.contact-block a{ font-family: "Unbounded", sans-serif; font-weight: 600; font-size: 16px; color: var(--white); }
.contact-block small{ display: block; color: var(--ink-300); font-size: 12px; margin-top: 2px; }
.contact-block small a{ font-family: inherit; font-weight: 400; font-size: 12px; color: var(--blue-400); }

.site-nav{ border-top: 1px solid rgba(255,255,255,.07); }
.site-nav .container{ display: flex; align-items: center; }
.site-nav ul{ display: flex; align-items: center; flex-wrap: wrap; }
.site-nav a{
  display: block;
  padding: 15px 18px;
  font-size: 14.5px;
  color: var(--ink-300);
  transition: color .15s;
}
.site-nav a:hover, .site-nav a.is-active{ color: var(--white); }
.site-nav li.is-active a{ color: var(--blue-400); }
.nav-toggle{ display: none; }

.breadcrumb{
  font-size: 13px;
  color: var(--ink-300);
  display: flex;
  gap: 8px;
  padding: 16px 0 0;
}
.breadcrumb a:hover{ color: var(--white); }

/* ---------- hero ---------- */
.hero{
  background: var(--navy-900);
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.hero::before{
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 900px 500px at 85% 20%, rgba(47,127,229,.22), transparent 60%),
    radial-gradient(ellipse 700px 500px at 100% 90%, rgba(255,106,61,.14), transparent 60%);
  pointer-events: none;
}
.hero .container{ position: relative; }
.hero-grid{
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 40px;
  align-items: center;
  padding: 72px 0 56px;
}
.hero h1{ font-size: 40px; }
.hero h1 em{ font-style: normal; color: var(--blue-400); }
.hero p.lead{ font-size: 18px; color: var(--ink-300); max-width: 46ch; }
.hero-actions{ display: flex; gap: 14px; flex-wrap: wrap; margin-top: 30px; }
.hero-features{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-top: 44px;
}
.hero-feature{ display: flex; align-items: flex-start; gap: 12px; }
.hero-feature .ico{ flex-shrink: 0; }
.hero-feature b{ display: block; font-size: 14px; font-weight: 600; }
.hero-feature span{ font-size: 12.5px; color: var(--ink-300); }

.hero-art{
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3.1;
  background: linear-gradient(160deg, #fbfcfe, var(--mist-200) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  padding: 28px;
}
.hero-art__glow{
  position: absolute; inset: 0;
  background: radial-gradient(circle at 70% 15%, rgba(47,127,229,.16), transparent 55%);
}
.hero-art img{ position: relative; width: 100%; height: 100%; object-fit: contain; }

/* ---------- icon chip ---------- */
.ico{
  width: 40px; height: 40px;
  border-radius: 11px;
  background: rgba(47,127,229,.14);
  color: var(--blue-400);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.ico svg{ width: 20px; height: 20px; }
.ico--ember{ background: rgba(255,106,61,.14); color: var(--ember-400); }
.ico--light{ background: var(--mist-200); color: var(--blue-600); }

/* ---------- stats bar ---------- */
.stats-bar{
  background: var(--navy-800);
  color: var(--white);
  border-radius: var(--radius-lg);
  margin-top: -46px;
  position: relative;
  z-index: 5;
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
}
.stats-bar .stat{
  padding: 30px 24px;
  border-right: 1px solid rgba(255,255,255,.08);
  display: flex;
  align-items: center;
  gap: 14px;
}
.stats-bar .stat:last-child{ border-right: none; }
.stat b{ font-family: "Unbounded", sans-serif; font-size: 24px; display: block; }
.stat span{ font-size: 12.5px; color: var(--ink-300); }

/* ---------- cards / grid ---------- */
.grid{ display: grid; gap: 26px; }
.grid--4{ grid-template-columns: repeat(4, 1fr); }
.grid--3{ grid-template-columns: repeat(3, 1fr); }
.grid--2{ grid-template-columns: repeat(2, 1fr); }

.card{
  background: var(--white);
  border: 1px solid var(--mist-200);
  border-radius: var(--radius-md);
  padding: 26px;
  transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
}
.card:hover{ box-shadow: var(--shadow-md); transform: translateY(-3px); border-color: transparent; }

.product-card{ display: flex; flex-direction: column; height: 100%; }
.product-card__img{
  background: var(--mist-100);
  border-radius: var(--radius-sm);
  aspect-ratio: 1.15/1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: 18px;
  padding: 18px;
}
.product-card__img img{ width: 100%; height: 100%; object-fit: contain; mix-blend-mode: multiply; }
.product-card h3{ font-size: 17px; margin-bottom: 6px; }
.product-card p{ font-size: 13.5px; color: var(--ink-500); margin-bottom: 16px; flex-grow: 1; }
.product-card__link{
  font-family: "Unbounded", sans-serif;
  font-size: 13px;
  font-weight: 600;
  color: var(--blue-600);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.product-card__link svg{ width: 14px; height: 14px; transition: transform .15s; }
.product-card:hover .product-card__link svg{ transform: translateX(3px); }

/* ---------- feature list ---------- */
.feature-row{
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}
.feature-row .feature{ text-align: left; }
.feature b{ display: block; font-family: "Unbounded", sans-serif; font-size: 14px; margin: 14px 0 6px; }
.feature span{ font-size: 13px; color: var(--ink-500); }

/* ---------- checklist ---------- */
.checklist li{
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 9px 0;
  font-size: 15px;
}
.checklist li svg{ flex-shrink: 0; margin-top: 3px; color: var(--blue-500); width: 18px; height: 18px; }

/* ---------- media split ---------- */
.split{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.split img, .split .media-frame{ border-radius: var(--radius-lg); }
.media-frame{ overflow: hidden; box-shadow: var(--shadow-md); }
.media-frame img{ width: 100%; height: 100%; object-fit: cover; }

.photo-grid{ display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.photo-grid .media-frame{ aspect-ratio: 4/3; }

/* ---------- CTA banner ---------- */
.cta-banner{
  background: linear-gradient(120deg, var(--navy-800), var(--navy-950));
  border-radius: var(--radius-lg);
  color: var(--white);
  padding: 48px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-banner h3{ font-size: 24px; margin-bottom: 6px; }
.cta-banner p{ color: var(--ink-300); margin: 0; }

/* ---------- trust / partners ---------- */
.partners{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.partner-note{
  background: var(--mist-100);
  border: 1px dashed var(--mist-300);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  font-size: 14px;
  color: var(--ink-500);
}

/* ---------- forms ---------- */
.form-grid{ display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field{ display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.field label{ font-size: 13.5px; font-weight: 600; color: var(--ink-700); }
.field label .req{ color: var(--ember-500); }
.field input, .field select, .field textarea{
  border: 1.5px solid var(--mist-300);
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  font-size: 14.5px;
  color: var(--ink-900);
  background: var(--white);
  transition: border-color .15s;
  width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus{
  outline: none;
  border-color: var(--blue-500);
}
.field textarea{ resize: vertical; min-height: 100px; }
.dropzone{
  border: 2px dashed var(--mist-300);
  border-radius: var(--radius-md);
  padding: 34px 20px;
  text-align: center;
  color: var(--ink-500);
  font-size: 14px;
  background: var(--mist-100);
}
.dropzone svg{ margin: 0 auto 10px; color: var(--blue-500); width: 30px; height: 30px; }
.checkline{ display: flex; align-items: flex-start; gap: 10px; font-size: 13px; color: var(--ink-500); }
.checkline input{ margin-top: 3px; }
.form-panel{
  background: var(--white);
  border: 1px solid var(--mist-200);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}
.side-panel{
  background: var(--mist-100);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 20px;
}
.side-panel h4{ font-size: 15px; margin-bottom: 14px; }
.step-list li{ display: flex; gap: 14px; padding: 12px 0; }
.step-list b{ font-family: "Unbounded", sans-serif; font-size: 14px; display: block; margin-bottom: 3px; }
.step-list span{ font-size: 13px; color: var(--ink-500); }
.step-num{
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--navy-900); color: var(--white);
  font-family: "Unbounded", sans-serif; font-size: 13px; font-weight: 600;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}

/* ---------- tables (certificates / gost) ---------- */
.gost-table{ width: 100%; border-collapse: collapse; font-size: 14.5px; }
.gost-table th, .gost-table td{ text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--mist-200); }
.gost-table th{ font-family: "Unbounded", sans-serif; font-size: 12px; letter-spacing: .05em; text-transform: uppercase; color: var(--ink-500); background: var(--mist-100); }
.gost-table tr:last-child td{ border-bottom: none; }

/* ---------- tabs / pills ---------- */
.pill-row{ display: flex; gap: 10px; flex-wrap: wrap; }
.pill{
  padding: 10px 18px;
  border-radius: 100px;
  border: 1.5px solid var(--mist-300);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink-700);
  background: var(--white);
}
.pill.is-active{ background: var(--navy-900); border-color: var(--navy-900); color: var(--white); }

/* ---------- sidebar catalog ---------- */
.catalog-layout{ display: grid; grid-template-columns: 280px 1fr; gap: 36px; align-items: start; }
.cat-list{ background: var(--white); border: 1px solid var(--mist-200); border-radius: var(--radius-md); overflow: hidden; }
.cat-list li a{
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; font-size: 14px; color: var(--ink-700);
  border-bottom: 1px solid var(--mist-200);
}
.cat-list li:last-child a{ border-bottom: none; }
.cat-list li a:hover, .cat-list li.is-active a{ background: var(--mist-100); color: var(--blue-600); }
.cat-list li.is-active a{ font-weight: 600; }
.cat-list li a b{ font-weight: 400; color: var(--ink-300); font-size: 12.5px; }

/* ---------- footer ---------- */
.site-footer{ background: var(--navy-950); color: var(--ink-300); padding-top: 64px; }
.footer-grid{
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-grid h4{ color: var(--white); font-size: 14px; margin-bottom: 18px; }
.footer-grid li{ padding: 6px 0; font-size: 14px; }
.footer-grid a:hover{ color: var(--white); }
.footer-brand img{ height: 48px; margin-bottom: 16px; }
.footer-brand p{ font-size: 13.5px; max-width: 30ch; }
.social-row{ display: flex; gap: 10px; margin-top: 18px; }
.social-row a{
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--navy-800);
  display: flex; align-items: center; justify-content: center;
  transition: background .15s;
}
.social-row a:hover{ background: var(--blue-500); }
.footer-map{ border-radius: var(--radius-md); overflow: hidden; height: 100%; min-height: 130px; position: relative; }
.footer-map img{ width: 100%; height: 100%; object-fit: cover; }
.footer-bottom{
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px 0; font-size: 13px; flex-wrap: wrap; gap: 10px;
}
.footer-bottom a:hover{ color: var(--white); }

/* ---------- responsive ---------- */
@media (max-width: 1080px){
  .hero-grid{ grid-template-columns: 1fr; }
  .hero-art{ order: -1; max-width: 480px; }
  .stats-bar{ grid-template-columns: repeat(3, 1fr); }
  .stats-bar .stat:nth-child(3){ border-right: none; }
  .grid--4{ grid-template-columns: repeat(2, 1fr); }
  .grid--3{ grid-template-columns: repeat(2, 1fr); }
  .feature-row{ grid-template-columns: repeat(3, 1fr); }
  .footer-grid{ grid-template-columns: 1fr 1fr; }
  .catalog-layout{ grid-template-columns: 1fr; }
  .split{ grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 760px){
  .topbar{ display: none; }
  .site-header__top{ padding: 14px 0; }
  .site-header__contacts{ display: none; }
  .site-nav{ display: none; }
  .nav-toggle{
    display: flex; margin-left: auto;
    width: 42px; height: 42px; border-radius: 10px;
    background: var(--navy-800); border: none; color: var(--white);
    align-items: center; justify-content: center;
  }
  .site-nav.is-open{ display: block !important; }
  .site-nav.is-open .container{ padding-top: 4px; padding-bottom: 12px; }
  .site-nav.is-open ul{ flex-direction: column; align-items: flex-start; }
  .site-nav.is-open li{ width: 100%; }
  .site-nav.is-open a{ padding: 13px 4px; border-bottom: 1px solid rgba(255,255,255,.06); }
  .hero h1{ font-size: clamp(24px, 7vw, 40px); }
  .hero h1 br{ display: none; }
  .hero-features{ grid-template-columns: repeat(2, 1fr); }
  .stats-bar{ grid-template-columns: repeat(2, 1fr); margin-top: 24px; }
  .stats-bar .stat:nth-child(odd){ border-right: 1px solid rgba(255,255,255,.08); }
  .stats-bar .stat:nth-child(even){ border-right: none; }
  .grid--4, .grid--3, .grid--2{ grid-template-columns: 1fr; }
  .feature-row{ grid-template-columns: repeat(2, 1fr); }
  .footer-grid{ grid-template-columns: 1fr; }
  .form-grid{ grid-template-columns: 1fr; }
  .cta-banner{ flex-direction: column; align-items: flex-start; }
  .section{ padding: 56px 0; }
}

/* ---------- utility ---------- */
.mb-0{ margin-bottom: 0; }
.text-center{ text-align: center; }
.flex-between{ display: flex; align-items: center; justify-content: space-between; gap: 16px; }