/* ==========================================================================
   PipePrime (pipeprime.ru) - Master Design System
   Премиальный B2B интерфейс для поставщика полимерных труб и фасонных изделий
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Цветовая палитра: High-Tech Industrial */
  --bg-primary: #0b1120;
  --bg-secondary: #0f172a;
  --bg-tertiary: #1e293b;
  --bg-card: rgba(30, 41, 59, 0.7);
  --bg-card-hover: rgba(51, 65, 85, 0.8);
  --bg-glass: rgba(15, 23, 42, 0.75);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-white: #ffffff;
  
  /* Брендовый акцент: Инженерный Оранжевый (тепло, энергия, трубы) */
  --accent-primary: #ff6b00;
  --accent-hover: #ff8533;
  --accent-light: rgba(255, 107, 0, 0.12);
  --accent-glow: rgba(255, 107, 0, 0.35);
  
  /* Вспомогательный синий (вода, надежность, ГОСТ) */
  --blue-primary: #2563eb;
  --blue-hover: #3b82f6;
  --blue-light: rgba(37, 99, 235, 0.12);
  
  /* Статусные цвета */
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  /* Границы и разделители */
  --border-subtle: rgba(148, 163, 184, 0.12);
  --border-medium: rgba(148, 163, 184, 0.22);
  --border-active: rgba(255, 107, 0, 0.6);
  
  /* Тени и глубина */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px var(--accent-glow);
  
  /* Радиусы */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Типографика */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-heading: 'Outfit', var(--font-sans);
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Контейнер */
  --container-max: 1640px;
  --header-height: 76px;
  --topbar-height: 0px;
}

/* Сброс стилей и базовые настройки */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

svg {
  max-width: 100%;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
}

/* Фоновая сетка и подсветка */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 15% 15%, rgba(255, 107, 0, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 65%, rgba(37, 99, 235, 0.07) 0%, transparent 45%),
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 48px 48px, 48px 48px;
  pointer-events: none;
  z-index: 0;
}

/* Типографика */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--text-white);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.2rem, 4vw, 3.4rem); }
h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); }
h3 { font-size: clamp(1.3rem, 2vw, 1.8rem); }
h4 { font-size: 1.2rem; }

p {
  color: var(--text-secondary);
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: 1rem;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(24px, 3.5vw, 56px);
  padding-right: clamp(24px, 3.5vw, 56px);
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   Верхняя инфо-панель (скрыта)
   ========================================================================== */
.top-bar {
  display: none !important;
}

/* Строгие инженерные подзаголовки (НЕ капсулы) */
.subheading-kicker,
.section-subtitle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-primary);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  margin-bottom: 12px;
}

.subheading-kicker::before,
.section-subtitle::before {
  content: '';
  display: inline-block;
  width: 18px;
  height: 2px;
  background: var(--accent-primary);
  border-radius: 1px;
}

.subheading-kicker--blue,
.section-subtitle--blue {
  color: #60a5fa;
}

.subheading-kicker--blue::before,
.section-subtitle--blue::before {
  background: #60a5fa;
}

/* Строгий технический тег (прямоугольный с микро-скруглением 4px, не пузырь) */
.badge-tag,
.calc-tag,
.tech-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  background: rgba(255, 107, 0, 0.08);
  color: var(--accent-primary);
  border: 1px solid rgba(255, 107, 0, 0.25);
  border-radius: 4px;
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-tag--blue,
.tech-tag--blue {
  background: rgba(96, 165, 250, 0.08);
  color: #60a5fa;
  border-color: rgba(96, 165, 250, 0.25);
}

/* ==========================================================================
   Главная шапка сайта (Header)
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  height: var(--header-height);
  z-index: 99;
  display: flex;
  align-items: center;
  transition: all 0.3s ease;
}

.header.scrolled {
  box-shadow: var(--shadow-md);
  border-bottom-color: var(--border-medium);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
}

/* Логотип */
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo__mark {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px var(--accent-glow);
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.logo:hover .logo__mark {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

.logo__mark img,
.logo__mark svg {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}


.logo__text {
  display: flex;
  flex-direction: column;
}

.logo__title {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-white);
  line-height: 1;
}

.logo__title span {
  color: var(--accent-primary);
}

.logo__desc {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 3px;
  white-space: nowrap;
}

/* Навигационное меню (Классическая инженерная навигация с неоновым световодом) */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-shrink: 0;
  white-space: nowrap;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 0;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  transition: color 0.2s ease;
  white-space: nowrap;
  text-decoration: none;
  user-select: none;
}

.nav-link:hover {
  color: var(--text-white);
}

.nav-link.active {
  color: var(--text-white);
  font-weight: 600;
  text-shadow: 0 0 16px rgba(255, 107, 0, 0.45);
}

/* Неоновый лазерный световод под активным разделом */
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2.5px;
  background: linear-gradient(90deg, #ff6b00 0%, #ff8533 50%, #ff6b00 100%);
  border-radius: 2px;
  box-shadow: 
    0 0 10px rgba(255, 107, 0, 0.8),
    0 0 3px #ff6b00,
    0 2px 8px rgba(255, 107, 0, 0.4);
}

/* Мягкий след при наведении для неактивных пунктов */
.nav-link:not(.active)::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: rgba(255, 107, 0, 0.6);
  border-radius: 2px;
  transition: width 0.25s cubic-bezier(0.16, 1, 0.3, 1), left 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-link:not(.active):hover::after {
  width: 100%;
  left: 0;
}

.nav-link svg.arrow {
  width: 13px;
  height: 13px;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  opacity: 0.65;
}

.nav-link:hover svg.arrow,
.nav-item--dropdown:hover .nav-link svg.arrow {
  opacity: 1;
  transform: translateY(2px);
}

/* Выпадающее меню каталога */
.nav-item--dropdown {
  position: relative;
}

.nav-item--dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 12px);
  left: -12px;
  width: 340px;
  background: rgba(15, 23, 42, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 12px;
  box-shadow: 
    0 20px 48px rgba(0, 0, 0, 0.65),
    0 4px 12px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 1000;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  transition: all 0.18s ease;
  border: 1px solid transparent;
}

.dropdown-item:hover {
  background: rgba(255, 107, 0, 0.12);
  color: var(--text-white);
  border-color: rgba(255, 107, 0, 0.25);
  transform: translateX(3px);
}

.dropdown-item svg {
  width: 16px;
  height: 16px;
  color: var(--accent-primary);
  flex-shrink: 0;
}

/* Правая сервисная зона хедера (Однострочная, строгая, без лишнего визуального шума) */
.header__actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 0;
  white-space: nowrap;
}

.header-phone {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--text-white);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  transition: all 0.2s ease;
  white-space: nowrap;
  padding: 6px 0;
}

.header-phone svg {
  color: var(--accent-primary);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.header-phone:hover {
  color: var(--accent-primary);
}

.header-phone:hover svg {
  transform: scale(1.12);
}

.header-divider {
  width: 1px;
  height: 22px;
  background: var(--border-medium);
  opacity: 0.7;
  flex-shrink: 0;
}

/* Корзина спецификации */

.spec-cart-btn {
  position: relative;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  color: var(--text-white);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s ease;
  flex-shrink: 0;
  white-space: nowrap;
}

.spec-cart-btn:hover {
  border-color: var(--accent-primary);
  background: var(--accent-light);
  color: var(--accent-primary);
}

.spec-cart-btn .badge {
  background: var(--accent-primary);
  color: white;
  border-radius: var(--radius-full);
  padding: 2px 7px;
  font-size: 0.75rem;
  font-weight: 700;
}

/* Кнопки */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: linear-gradient(135deg, #ff6b00 0%, #f97316 100%);
  color: white;
  box-shadow: 0 4px 16px rgba(255, 107, 0, 0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 107, 0, 0.45);
  background: linear-gradient(135deg, #ff7a1a 0%, #fb923c 100%);
}

.btn--outline {
  background: transparent;
  color: var(--text-white);
  border: 1px solid var(--border-medium);
}

.btn--outline:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: var(--accent-light);
  transform: translateY(-2px);
}

.btn--secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn--secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
}

.btn--lg {
  padding: 14px 28px;
  font-size: 1.05rem;
}

.btn--sm {
  padding: 7px 14px;
  font-size: 0.85rem;
}

/* Мобильный бургер */
.burger-btn {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-white);
  padding: 8px;
}

/* ==========================================================================
   Сетки преимуществ и инфо-карточек (Features & Advantages)
   ========================================================================== */
.features-grid, .advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card, .adv-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.feature-card:hover, .adv-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-card__icon, .adv-card__icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: rgba(255, 107, 0, 0.12);
  border: 1px solid rgba(255, 107, 0, 0.25);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  flex-shrink: 0;
}

.feature-card__icon svg, .adv-card__icon svg {
  width: 26px !important;
  height: 26px !important;
  max-width: 26px !important;
  max-height: 26px !important;
  fill: none !important;
  stroke: currentColor !important;
  stroke-width: 2 !important;
  stroke-linecap: round !important;
  stroke-linejoin: round !important;
  display: block !important;
  flex-shrink: 0 !important;
}

.feature-card__title, .adv-card__title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 10px;
  line-height: 1.3;
}

.feature-card__desc, .adv-card__desc {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* ==========================================================================
   Hero Секция
   ========================================================================== */
.hero {
  position: relative;
  padding: 80px 0 90px;
  overflow: hidden;
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
}

/* Атмосферный фон с инженерной фотографией */
.hero__bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.hero__bg-img {
  position: absolute;
  top: 0;
  right: 0;
  width: 65%;
  height: 100%;
  background-size: cover;
  background-position: center right;
  opacity: 0.35;
  filter: saturate(0.85) contrast(1.15);
  transform: scale(1.02);
}

.hero__bg-overlay {
  position: absolute;
  inset: 0;
  background: 
    linear-gradient(90deg, #0b1120 0%, #0b1120 38%, rgba(11, 17, 32, 0.88) 60%, rgba(11, 17, 32, 0.65) 80%, rgba(11, 17, 32, 0.92) 100%),
    linear-gradient(180deg, rgba(11, 17, 32, 0.85) 0%, transparent 15%, transparent 75%, #0b1120 100%);
}

.hero__bg-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.75;
}

.hero__container {
  display: flex;
  flex-direction: column;
  gap: 56px;
  position: relative;
  z-index: 2;
  width: 100%;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.18fr 0.92fr;
  gap: 64px;
  align-items: center;
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 740px;
}

.hero__eyebrow {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.hero__eyebrow-accent {
  color: var(--accent-primary);
}

.hero__eyebrow-sep {
  color: var(--border-medium);
  font-weight: 400;
}

.hero__title {
  margin-bottom: 24px;
  line-height: 1.14;
  font-size: clamp(2.4rem, 4.2vw, 3.8rem);
}

.hero__title .highlight {
  background: linear-gradient(90deg, #ff8533 0%, #ff6b00 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__lead {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 660px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* ==========================================================================
   Hero Catalog Matrix (Инженерная экспресс-матрица номенклатуры)
   ========================================================================== */
.hero__visual {
  position: relative;
  width: 100%;
}

.hero-matrix {
  position: relative;
  background: rgba(15, 23, 42, 0.76);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 16px;
  padding: 20px 20px 16px;
  box-shadow: 
    0 24px 64px rgba(0, 0, 0, 0.55),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.hero-matrix__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 2px;
}

.hero-matrix__label {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-white);
}

.matrix-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-primary);
  box-shadow: 0 0 10px var(--accent-primary);
  display: inline-block;
  animation: matrixDotPulse 2.4s infinite ease-in-out;
}

@keyframes matrixDotPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.85); }
}

.hero-matrix__all-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-primary);
  text-decoration: none;
  transition: all 0.2s ease;
}

.hero-matrix__all-link svg {
  transition: transform 0.2s ease;
}

.hero-matrix__all-link:hover {
  color: var(--accent-hover);
}

.hero-matrix__all-link:hover svg {
  transform: translateX(3px);
}

.hero-matrix__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.hero-matrix-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: rgba(22, 33, 54, 0.65);
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 12px;
  padding: 14px 14px 12px;
  text-decoration: none;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

/* Верхняя лазерная линия при ховере */
.hero-matrix-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #ff6b00, #ff8533);
  transition: width 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-matrix-card:hover {
  background: rgba(30, 43, 70, 0.85);
  border-color: rgba(255, 107, 0, 0.45);
  transform: translateY(-2px);
  box-shadow: 
    0 12px 30px rgba(0, 0, 0, 0.45),
    0 0 20px rgba(255, 107, 0, 0.16);
}

.hero-matrix-card:hover::before {
  width: 100%;
}

.hero-matrix-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.hero-matrix-card__tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-primary);
}

.hero-matrix-card__arrow {
  width: 22px;
  height: 22px;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(148, 163, 184, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.hero-matrix-card:hover .hero-matrix-card__arrow {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #fff;
  transform: translate(2px, -2px);
}

.hero-matrix-card__visual {
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2px 0;
  margin: 2px 0;
}

.hero-matrix-card__visual img {
  max-height: 100%;
  max-width: 92%;
  object-fit: contain;
  filter: drop-shadow(0 6px 14px rgba(0, 0, 0, 0.5));
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-matrix-card:hover .hero-matrix-card__visual img {
  transform: scale(1.08) translateY(-2px);
}

.hero-matrix-card__info {
  margin-top: 4px;
}

.hero-matrix-card__title {
  font-family: var(--font-heading);
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-white);
  line-height: 1.25;
  margin-bottom: 2px;
}

.hero-matrix-card__spec {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: #ff8533;
  margin-bottom: 2px;
}

.hero-matrix-card__desc {
  font-size: 0.72rem;
  color: var(--text-secondary);
  line-height: 1.3;
}

/* Подвал матрицы с оперативной информацией */
.hero-matrix__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(11, 17, 32, 0.65);
  border: 1px solid rgba(148, 163, 184, 0.1);
  border-radius: 8px;
  padding: 8px 12px;
  margin-top: 2px;
}

.hero-matrix__chip {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.73rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

.hero-matrix__chip svg {
  color: var(--accent-primary);
  flex-shrink: 0;
}

.hero-matrix__divider {
  width: 1px;
  height: 14px;
  background: rgba(148, 163, 184, 0.16);
}

/* ==========================================================================
   Новая инженерная панель ключевых метрик (Precision Stats Strip)
   ========================================================================== */
.hero-stats-panel {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  width: 100%;
  position: relative;
  z-index: 2;
}

.hero-stat-card {
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.55) 0%, rgba(15, 23, 42, 0.75) 100%);
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: 12px;
  padding: 24px 28px;
  position: relative;
  transition: all 0.25s ease;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  overflow: hidden;
}

.hero-stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(148, 163, 184, 0.3), transparent);
  transition: background 0.3s;
}

.hero-stat-card:hover {
  border-color: rgba(255, 107, 0, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.45);
}

.hero-stat-card:hover::before {
  background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
}

.hero-stat-card--accent {
  border-color: rgba(255, 107, 0, 0.32);
  background: linear-gradient(180deg, rgba(255, 107, 0, 0.08) 0%, rgba(15, 23, 42, 0.75) 100%);
}

.hero-stat-card__tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-primary);
  letter-spacing: 0.08em;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-stat-card__metric {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 8px;
  line-height: 1;
}

.hero-stat-card__number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-white);
  letter-spacing: -0.02em;
}

.hero-stat-card__unit,
.hero-stat-card__prefix {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.hero-stat-card__title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 6px;
}

.hero-stat-card__desc {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   Секции и заголовки
   ========================================================================== */
.section {
  padding: 90px 0;
  position: relative;
  z-index: 1;
}

.section--alt {
  background: rgba(15, 23, 42, 0.5);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  margin-bottom: 50px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.section-header--center {
  align-items: center;
  text-align: center;
}

.section-header__subtitle {
  color: var(--accent-primary);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-header__subtitle::before {
  content: '';
  width: 20px;
  height: 2px;
  background: var(--accent-primary);
}

.section-header--center .section-header__subtitle::after {
  content: '';
  width: 20px;
  height: 2px;
  background: var(--accent-primary);
}

.section-header__title {
  margin-bottom: 16px;
}

.section-header__desc {
  max-width: 680px;
  font-size: 1.05rem;
}

/* ==========================================================================
   Сетка категорий каталога (Catalog Cards)
   ========================================================================== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 24px;
}

.category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.category-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-active);
  box-shadow: var(--shadow-glow);
  background: var(--bg-card-hover);
}

.category-card__badge {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(255, 107, 0, 0.12);
  color: var(--accent-primary);
  border: 1px solid rgba(255, 107, 0, 0.25);
}

.category-card__image-box {
  width: 100%;
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  background: rgba(11, 17, 32, 0.4);
  border-radius: var(--radius-md);
  padding: 16px;
  overflow: hidden;
}

.category-card__image-box img {
  max-height: 100%;
  object-fit: contain;
  transition: transform 0.3s ease;
}

.category-card:hover .category-card__image-box img {
  transform: scale(1.08);
}

.category-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 10px;
  line-height: 1.35;
}

.category-card__desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  flex-grow: 1;
}

.category-card__features {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 20px;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
}

.category-card__feature-item {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.category-card__feature-item::before {
  content: '✓';
  color: var(--accent-primary);
  font-weight: 700;
}

.category-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
}

.category-card__action {
  color: var(--accent-primary);
  font-weight: 600;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s ease;
}

.category-card:hover .category-card__action {
  gap: 10px;
}

/* ==========================================================================
   Сравнение материалов (PE-RT vs Сталь vs PEX)
   ========================================================================== */
.comparison-table-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  overflow-x: auto;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(12px);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 680px;
}

.comparison-table th, .comparison-table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.comparison-table th {
  background: rgba(11, 17, 32, 0.6);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-white);
}

.comparison-table th.col-highlight {
  background: rgba(255, 107, 0, 0.12);
  color: var(--accent-primary);
  border-left: 2px solid var(--accent-primary);
  border-right: 2px solid var(--accent-primary);
  border-top: 2px solid var(--accent-primary);
}

.comparison-table td.col-highlight {
  background: rgba(255, 107, 0, 0.05);
  font-weight: 600;
  color: var(--text-white);
  border-left: 2px solid var(--accent-primary);
  border-right: 2px solid var(--accent-primary);
}

.comparison-table tr:last-child td.col-highlight {
  border-bottom: 2px solid var(--accent-primary);
}

.val-good {
  color: var(--success);
  font-weight: 600;
}

.val-bad {
  color: var(--danger);
}

.val-mid {
  color: var(--warning);
}

/* ==========================================================================
   Инженерный калькулятор (Widget & Page)
   ========================================================================== */
.calc-card {
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  padding: 36px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(12px);
}

.calc-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
}

.form-group {
  margin-bottom: 22px;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 8px;
}

.form-label span.hint {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-left: 6px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  background: rgba(11, 17, 32, 0.75);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  color: var(--text-white);
  font-size: 0.95rem;
  transition: all 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(255, 107, 0, 0.15);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Результаты расчета */
.calc-results {
  background: rgba(11, 17, 32, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.calc-results__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.calc-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.calc-stat-box {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 18px;
}

.calc-stat-box__val {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent-primary);
  line-height: 1.1;
  margin-bottom: 4px;
}

.calc-stat-box__lbl {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.3;
}

.calc-logistics-hint {
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: var(--accent-light);
  border-left: 3px solid var(--accent-primary);
  padding: 12px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 24px;
}

/* ==========================================================================
   Преимущества PipePrime (B2B Distributor)
   ========================================================================== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.adv-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.3s ease;
  position: relative;
}

.adv-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-medium);
  box-shadow: var(--shadow-md);
}

.adv-card__icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--accent-light);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.adv-card__icon svg {
  width: 28px;
  height: 28px;
}

.adv-card__title {
  font-size: 1.2rem;
  color: var(--text-white);
  margin-bottom: 10px;
}

.adv-card__desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   Презентация АТР 2026 (Альбом решений)
   ========================================================================== */
.atr-banner {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.9) 0%, rgba(15, 23, 42, 0.95) 100%);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  padding: 48px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
  box-shadow: var(--shadow-lg);
}

.atr-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 24px 0 32px;
}

.atr-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.atr-feature-item svg {
  width: 20px;
  height: 20px;
  color: var(--accent-primary);
  flex-shrink: 0;
}

.atr-preview {
  position: relative;
  display: flex;
  justify-content: center;
}

.atr-preview__book {
  width: 260px;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  border: 1px solid var(--border-medium);
  transition: transform 0.4s ease;
}

.atr-preview:hover .atr-preview__book {
  transform: rotate(-2deg) scale(1.04);
}

/* ==========================================================================
   Форма быстрой загрузки смет / проектов
   ========================================================================== */
.lead-form-card {
  background: var(--bg-card);
  border: 1px solid var(--border-active);
  border-radius: var(--radius-xl);
  padding: 48px;
  box-shadow: var(--shadow-glow);
  max-width: 900px;
  margin: 0 auto;
}

.file-dropzone {
  border: 2px dashed var(--border-medium);
  border-radius: var(--radius-md);
  padding: 36px;
  text-align: center;
  background: rgba(11, 17, 32, 0.5);
  cursor: pointer;
  transition: all 0.2s;
  margin-bottom: 24px;
}

.file-dropzone:hover, .file-dropzone.dragover {
  border-color: var(--accent-primary);
  background: var(--accent-light);
}

.file-dropzone svg {
  width: 44px;
  height: 44px;
  color: var(--accent-primary);
  margin-bottom: 12px;
}

.file-dropzone__title {
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 4px;
}

.file-dropzone__desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Подвал сайта (Footer)
   ========================================================================== */
.footer {
  background: #070b14;
  border-top: 1px solid var(--border-subtle);
  padding: 70px 0 30px;
  margin-top: auto;
  position: relative;
  z-index: 10;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer__col-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 20px;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__link {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color 0.2s;
}

.footer__link:hover {
  color: var(--accent-primary);
}

.footer__contacts {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer__contact-item svg {
  width: 18px;
  height: 18px;
  color: var(--accent-primary);
  flex-shrink: 0;
  margin-top: 3px;
}

.footer__bottom {
  padding-top: 30px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 16px;
}

/* ==========================================================================
   Модальные окна и Drawer корзины
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(7, 11, 20, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 580px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  padding: 32px;
  position: relative;
  transform: scale(0.95);
  transition: transform 0.25s ease;
}

.modal-backdrop.active .modal-card {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: color 0.2s;
}

.modal-close:hover {
  color: var(--text-white);
}

/* Drawer корзины спецификаций */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1001;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.drawer-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  max-width: 480px;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-medium);
  box-shadow: var(--shadow-lg);
  z-index: 1002;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.drawer-backdrop.active .drawer {
  transform: translateX(0);
}

.drawer__header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.drawer__body {
  padding: 24px;
  flex-grow: 1;
  overflow-y: auto;
}

.drawer__footer {
  padding: 20px 24px;
  border-top: 1px solid var(--border-subtle);
  background: rgba(11, 17, 32, 0.6);
}

.cart-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-subtle);
  gap: 12px;
}

.cart-item__info {
  flex-grow: 1;
}

.cart-item__title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 2px;
}

.cart-item__meta {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.cart-item__actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.qty-input {
  width: 60px;
  padding: 4px 8px;
  text-align: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: white;
  font-size: 0.85rem;
}

.cart-item__remove {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  transition: color 0.2s;
}

.cart-item__remove:hover {
  color: var(--danger);
}

/* Toast уведомления */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  border-left: 4px solid var(--accent-primary);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  box-shadow: var(--shadow-md);
  color: var(--text-white);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 12px;
  transform: translateY(20px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* ==========================================================================
   Адаптивность (Media Queries)
   ========================================================================== */
@media (max-width: 1080px) {
  .hero {
    padding: 60px 0;
  }
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-stats-panel {
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 36px;
  }
  .hero__bg-img {
    width: 100%;
    opacity: 0.18;
  }
  .atr-banner {
    grid-template-columns: 1fr;
  }
  .calc-grid {
    grid-template-columns: 1fr;
  }
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .top-bar {
    display: none;
  }
  .nav-menu {
    display: none;
  }
  .burger-btn {
    display: block;
  }
  .hero-stats-panel {
    grid-template-columns: 1fr;
    gap: 14px;
    margin-top: 28px;
  }
  .hero-matrix__grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .hero-matrix__footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .hero-matrix__divider {
    display: none;
  }
  .footer__grid {
    grid-template-columns: 1fr;
  }
  .hero__actions {
    flex-direction: column;
  }
  .hero__actions .btn {
    width: 100%;
  }
}

@media (max-width: 576px) {
  .header-phone span {
    display: none;
  }
  .header-divider {
    display: none;
  }
  .header__actions {
    gap: 12px;
  }
  .header-phone {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    padding: 0;
  }
}