/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* === VARIABLES === */
:root {
  --color-black:        #1E1E1E;
  --color-graphite:     #2B2B2B;
  --color-accent:       #F5A623;
  --color-accent-dark:  #D4891A;
  --color-accent-light: #FFF3DC;
  --color-white:        #FFFFFF;
  --color-bg:           #FFFFFF;
  --color-bg-light:     #F7F7F7;
  --color-bg-dark:      #1E1E1E;
  --color-bg-card:      #FFFFFF;
  --color-text:         #1E1E1E;
  --color-text-muted:   #6B6B6B;
  --color-text-light:   #999999;
  --color-text-inverse: #FFFFFF;
  --color-border:       #E5E5E5;
  --color-border-dark:  #333333;

  --font-heading: 'Manrope', sans-serif;
  --font-body:    'IBM Plex Sans', sans-serif;

  --text-hero:   clamp(36px, 5.5vw, 64px);
  --text-h1:     clamp(28px, 4vw, 48px);
  --text-h2:     clamp(22px, 3vw, 36px);
  --text-h3:     clamp(18px, 2vw, 22px);
  --text-lead:   18px;
  --text-body:   16px;
  --text-small:  14px;
  --text-xs:     12px;

  --weight-regular:   400;
  --weight-medium:    500;
  --weight-semibold:  600;
  --weight-bold:      700;
  --weight-extrabold: 800;

  --leading-tight:  1.2;
  --leading-normal: 1.5;
  --leading-loose:  1.7;

  --tracking-tight:  -0.02em;
  --tracking-normal:  0;
  --tracking-wide:    0.05em;
  --tracking-wider:   0.1em;

  --container-max: 1200px;
  --container-pad: clamp(16px, 4vw, 40px);
  --section-py:    clamp(40px, 5vw, 64px);
  --section-py-sm: clamp(24px, 3vw, 40px);
  --grid-gap:      24px;
  --grid-gap-lg:   32px;
  --card-pad:      28px;
  --card-pad-sm:   20px;
  --border-radius:    6px;
  --border-radius-sm: 4px;

  --bp-sm:  480px;
  --bp-md:  768px;
  --bp-lg: 1024px;
}

/* === TYPOGRAPHY === */
body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-graphite);
}

h1 { font-size: var(--text-h1); }
h2 { font-size: var(--text-h2); }
h3 { font-size: var(--text-h3); }

.dark-section h1,
.dark-section h2,
.dark-section h3 { color: var(--color-white); }

.section-title {
  position: relative;
  padding-bottom: 16px;
  margin-bottom: 8px;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 48px; height: 3px;
  background: var(--color-accent);
}
.section-title.centered::after {
  left: 50%;
  transform: translateX(-50%);
}

.lead {
  font-size: var(--text-lead);
  line-height: var(--leading-loose);
  color: var(--color-text-muted);
  font-weight: var(--weight-regular);
}

.label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent);
}

/* === LAYOUT === */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.section { padding: var(--section-py) 0; }
.section--sm { padding: var(--section-py-sm) 0; }
.section--white  { background: var(--color-bg); }
.section--light  { background: var(--color-bg-light); }
.section--dark   { background: var(--color-bg-dark); color: var(--color-text-inverse); }

.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--grid-gap); }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--grid-gap); }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--grid-gap); }

.section-header { margin-bottom: clamp(32px, 5vw, 56px); }
.section-header p { margin-top: 16px; }

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.02em;
  border-radius: var(--border-radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}
.btn--lg { padding: 17px 36px; font-size: 16px; }
.btn--sm { padding: 10px 20px; font-size: 13px; }

.btn--primary {
  background: var(--color-accent);
  color: var(--color-graphite);
  border-color: var(--color-accent);
}
.btn--primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(245,166,35,0.35);
}

.btn--secondary {
  background: transparent;
  color: var(--color-graphite);
  border-color: var(--color-graphite);
}
.btn--secondary:hover {
  background: var(--color-graphite);
  color: var(--color-white);
}

.btn--outline-white {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.5);
}
.btn--outline-white:hover {
  border-color: var(--color-white);
  background: rgba(255,255,255,0.08);
}

/* === HEADER === */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow 0.3s ease;
}
.header.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.08); }

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.header__logo { text-decoration: none; display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.header__logo img { height: 36px; width: auto; }
.header__tagline {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  border-left: 1px solid var(--color-border);
  padding-left: 12px;
  line-height: 1.3;
}

.nav { display: flex; align-items: center; }
.nav__list { display: flex; align-items: center; gap: 32px; }
.nav__link {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: var(--weight-medium);
  color: var(--color-graphite);
  text-decoration: none;
  transition: color 0.2s;
  position: relative;
}
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--color-accent);
  transition: width 0.2s ease;
}
.nav__link:hover::after,
.nav__link.active::after { width: 100%; }

.header__contacts { display: flex; align-items: center; gap: 16px; flex-shrink: 0; }
.header__phone {
  font-weight: var(--weight-semibold);
  color: var(--color-graphite);
  text-decoration: none;
  font-size: 15px;
  white-space: nowrap;
}
.header__phone:hover { color: var(--color-accent); }

.burger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
.burger__line {
  width: 24px; height: 2px;
  background: var(--color-graphite);
  transition: all 0.3s ease;
  border-radius: 2px;
}
.burger--active .burger__line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger--active .burger__line:nth-child(2) { opacity: 0; }
.burger--active .burger__line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* === HERO === */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  background: var(--color-bg-dark);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--color-accent);
  z-index: 2;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #0a0a0a 0%, #1e1e1e 50%, #2b2b2b 100%);
  z-index: 0;
}
.hero__bg-pattern {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 60px,
      rgba(245,166,35,0.03) 60px,
      rgba(245,166,35,0.03) 61px
    ),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 60px,
      rgba(245,166,35,0.03) 60px,
      rgba(245,166,35,0.03) 61px
    );
  z-index: 0;
}
.hero__inner {
  position: relative;
  z-index: 1;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: flex-start;
  padding: var(--section-py) 0;
}
.hero__content {
  position: relative;
  z-index: 1;
}
.hero__slider {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  background: rgba(255,255,255,0.04);
  aspect-ratio: 4/3;
  max-height: 440px;
}
.hero__slides {
  position: relative;
  width: 100%;
  height: 100%;
}
.hero__slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.6s ease;
}
.hero__slide.active { opacity: 1; }
.hero__slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.hero__slide-label {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: rgba(0,0,0,0.55);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 4px;
  backdrop-filter: blur(4px);
}
.hero__slider-dots {
  position: absolute;
  bottom: 14px;
  right: 14px;
  display: flex;
  gap: 6px;
}
.hero__slider-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: background 0.3s, transform 0.3s;
}
.hero__slider-dot.active {
  background: var(--color-accent);
  transform: scale(1.3);
}
.hero__label { margin-bottom: 20px; }
.hero__title {
  font-size: var(--text-hero);
  color: var(--color-white);
  margin-bottom: 24px;
  letter-spacing: -0.03em;
  line-height: 1.1;
}
.hero__title em {
  font-style: normal;
  color: var(--color-accent);
}
.hero__subtitle {
  font-size: 18px;
  color: rgba(255,255,255,0.7);
  line-height: 1.65;
  margin-bottom: 40px;
  max-width: 560px;
}
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero__stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.hero__stat-num {
  font-family: var(--font-heading);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: var(--weight-extrabold);
  color: var(--color-accent);
  line-height: 1;
}
.hero__stat-label {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  margin-top: 6px;
  line-height: 1.4;
}

/* === SECTIONS === */
.section-intro { max-width: 700px; margin-bottom: clamp(32px, 5vw, 56px); }

/* === ADVANTAGE CARDS === */
.advantage-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: var(--card-pad);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  transition: border-color 0.25s, box-shadow 0.25s;
}
.advantage-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 24px rgba(245,166,35,0.1);
}
.advantage-card__icon {
  width: 48px; height: 48px;
  background: var(--color-accent-light);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  flex-shrink: 0;
}
.advantage-card__icon svg { width: 24px; height: 24px; }
.advantage-card__title {
  font-size: 17px;
  font-weight: var(--weight-bold);
  color: var(--color-graphite);
  font-family: var(--font-heading);
}
.advantage-card__text {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Lined variant */
.advantage-card--lined {
  border: none;
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  padding-left: 20px;
}

/* === PRODUCT CARDS === */
.product-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 0 2px var(--color-accent), 0 12px 40px rgba(0,0,0,0.12);
}
.product-card__image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.product-card__image img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.product-card:hover .product-card__image img { transform: scale(1.04); }
.product-card__placeholder {
  width: 100%; height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
  color: var(--color-text-light);
  background: linear-gradient(135deg, #f0f0f0 0%, #e8e8e8 100%);
}
.product-card__placeholder svg { width: 40px; height: 40px; opacity: 0.4; }
.product-card__placeholder-label {
  font-size: 11px;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.5;
}
.product-card__category {
  position: absolute;
  top: 12px; left: 12px;
  z-index: 2;
  background: var(--color-graphite);
  color: var(--color-white);
  font-size: 10px;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 3px;
}
.product-card__category--hydro { background: #2563EB; }
.product-card__body { padding: var(--card-pad); flex: 1; display: flex; flex-direction: column; }
.product-card__tag { display: block; margin-bottom: 10px; }
.product-card__title {
  font-size: var(--text-h3);
  font-weight: var(--weight-bold);
  margin-bottom: 10px;
  color: var(--color-graphite);
  font-family: var(--font-heading);
}
.product-card__desc {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex: 1;
}
.product-card__specs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.spec-tag {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  padding: 4px 10px;
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  font-family: var(--font-body);
}

/* === APPLICATIONS === */
.applications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--grid-gap);
}
.app-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--card-pad-sm);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.app-card__icon {
  width: 44px; height: 44px;
  background: var(--color-accent-light);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}
.app-card__icon svg { width: 22px; height: 22px; }
.app-card__title {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: var(--weight-bold);
  color: var(--color-graphite);
}
.app-card__text { font-size: 13px; color: var(--color-text-muted); line-height: 1.55; }

/* === TABLES === */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
}
.specs-table {
  width: 100%;
  min-width: 360px;
  border-collapse: collapse;
  font-family: var(--font-body);
  font-size: var(--text-small);
}
.specs-table thead { background: var(--color-graphite); color: var(--color-white); }
.specs-table th {
  padding: 12px 16px;
  text-align: left;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.03em;
  white-space: nowrap;
  border-right: 1px solid rgba(255,255,255,0.1);
}
.specs-table th:first-child,
.specs-table td:first-child {
  font-weight: var(--weight-bold);
  background: var(--color-bg-light);
  color: var(--color-graphite);
  position: sticky;
  left: 0;
  z-index: 1;
}
.specs-table thead th:first-child { background: var(--color-black); color: var(--color-white); }
.specs-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
  color: var(--color-text);
  white-space: nowrap;
}
.specs-table tbody tr:nth-child(even) td { background: var(--color-bg-light); }
.specs-table tbody tr:nth-child(even) td:first-child { background: #EFEFEF; }
.specs-table tbody tr:hover td { background: var(--color-accent-light); cursor: default; }
.specs-table tbody tr:hover td:first-child { background: #FDECC8; }

/* === FORMS === */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group--full { grid-column: 1 / -1; }
.form-label {
  font-size: var(--text-small);
  font-weight: var(--weight-semibold);
  color: var(--color-graphite);
  letter-spacing: 0.02em;
}
.form-input,
.form-select,
.form-textarea {
  padding: 12px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--border-radius);
  font-family: var(--font-body);
  font-size: var(--text-body);
  color: var(--color-text);
  background: var(--color-white);
  transition: border-color 0.2s, box-shadow 0.2s;
  appearance: none;
  outline: none;
  width: 100%;
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(245,166,35,0.15);
}
.form-input::placeholder,
.form-textarea::placeholder { color: var(--color-text-light); }
.form-textarea { resize: vertical; min-height: 110px; }
.form-select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236B6B6B' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 16px center; padding-right: 40px; }
.form-honeypot { display: none !important; }
.form-submit-wrap { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.form-note { font-size: 13px; color: var(--color-text-muted); line-height: 1.5; }

/* === CTA SECTION === */
.cta-section {
  background: var(--color-graphite);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--color-accent);
}
.cta-section__content { text-align: center; max-width: 680px; margin: 0 auto; }
.cta-section h2 { color: var(--color-white); margin-bottom: 16px; }
.cta-section p { color: rgba(255,255,255,0.7); margin-bottom: 32px; font-size: 18px; line-height: 1.6; }
.cta-section__actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* === CONTACT SECTION === */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-info__item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}
.contact-info__item:first-child { padding-top: 0; }
.contact-info__icon {
  width: 44px; height: 44px;
  background: var(--color-accent-light);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  flex-shrink: 0;
}
.contact-info__icon svg { width: 20px; height: 20px; }
.contact-info__label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}
.contact-info__value {
  font-size: 16px;
  font-weight: var(--weight-semibold);
  color: var(--color-graphite);
  text-decoration: none;
}
.contact-info__value:hover { color: var(--color-accent); }
.contact-info__sub { font-size: 13px; color: var(--color-text-muted); margin-top: 2px; }

/* === BREADCRUMBS === */
.breadcrumbs { padding: 14px 0; }
.breadcrumbs__list { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.breadcrumbs__item { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.breadcrumbs__link { color: var(--color-text-muted); text-decoration: none; transition: color 0.2s; }
.breadcrumbs__link:hover { color: var(--color-accent); }
.breadcrumbs__separator { color: var(--color-border); font-size: 12px; }
.breadcrumbs__current { color: var(--color-text-muted); }

/* === PRODUCT PAGE === */
.product-hero {
  background: var(--color-bg-light);
  padding: clamp(40px, 6vw, 72px) 0;
}
.product-hero__inner { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.product-hero__label { margin-bottom: 12px; }
.product-hero__title { font-size: var(--text-h1); margin-bottom: 16px; }
.product-hero__subtitle {
  font-size: 18px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 28px;
}
.product-hero__meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }
.product-hero__actions { display: flex; gap: 12px; flex-wrap: wrap; }
.product-hero__image {
  aspect-ratio: 4/3;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.product-hero__image img { width: 100%; height: 100%; object-fit: contain; padding: 20px; }

.product-gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.product-gallery__item {
  aspect-ratio: 4/3;
  background: var(--color-bg-light);
  border-radius: var(--border-radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-gallery__item img { width: 100%; height: 100%; object-fit: cover; }

/* Placeholder gallery */
.gallery-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  color: var(--color-text-light);
  width: 100%;
  height: 100%;
  min-height: 200px;
}
.gallery-placeholder svg { opacity: 0.3; }
.gallery-placeholder span { font-size: 12px; opacity: 0.5; text-align: center; }

/* === COMPARISON TABLE === */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-small);
  font-family: var(--font-body);
}
.comparison-table th, .comparison-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
.comparison-table thead th {
  background: var(--color-graphite);
  color: var(--color-white);
  font-weight: var(--weight-semibold);
}
.comparison-table tbody tr:hover td { background: var(--color-accent-light); }
.comparison-table td:first-child { font-weight: var(--weight-semibold); color: var(--color-graphite); }

/* === FAQ === */
.faq-list { display: flex; flex-direction: column; gap: 0; }
.faq-item {
  border-bottom: 1px solid var(--color-border);
}
.faq-item:first-child { border-top: 1px solid var(--color-border); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  cursor: pointer;
  font-family: var(--font-heading);
  font-weight: var(--weight-semibold);
  font-size: 16px;
  color: var(--color-graphite);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  transition: color 0.2s;
}
.faq-question:hover { color: var(--color-accent); }
.faq-icon { width: 20px; height: 20px; flex-shrink: 0; transition: transform 0.3s; color: var(--color-accent); }
.faq-item.open .faq-icon { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}
.faq-answer p {
  padding: 0 0 20px;
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.7;
}
.faq-item.open .faq-answer { max-height: 400px; }

/* === PROCESS STEPS === */
.process-steps { display: flex; flex-direction: column; gap: 0; counter-reset: step; }
.process-step {
  display: flex;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--color-border);
  counter-increment: step;
}
.process-step:last-child { border-bottom: none; }
.process-step__num {
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: var(--weight-extrabold);
  color: var(--color-accent);
  line-height: 1;
  flex-shrink: 0;
  min-width: 48px;
}
.process-step__title {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: var(--weight-bold);
  color: var(--color-graphite);
  margin-bottom: 6px;
}
.process-step__text { font-size: 15px; color: var(--color-text-muted); line-height: 1.6; }

/* === FLOAT BUTTON === */
.float-btn {
  position: fixed;
  bottom: 28px; right: 28px;
  z-index: 999;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: #229ED9;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(34,158,217,0.45);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  text-decoration: none;
}
.float-btn:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 28px rgba(34,158,217,0.55);
}
.float-btn svg { width: 26px; height: 26px; fill: white; }

/* === FOOTER === */
.footer { background: var(--color-bg-dark); color: rgba(255,255,255,0.65); }
.footer::before {
  content: '';
  display: block;
  height: 3px;
  background: var(--color-accent);
}
.footer__main { padding: 60px 0 40px; }
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 28px;
}
.footer__logo {
  filter: brightness(0) invert(1);
  height: 32px; width: auto;
  margin-bottom: 16px;
}
.footer__desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.5);
  margin-bottom: 20px;
}
.footer__contacts a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  margin-bottom: 8px;
  transition: color 0.2s;
}
.footer__contacts a:hover { color: var(--color-accent); }
.footer__col-title {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: 16px;
}
.footer__links { display: flex; flex-direction: column; gap: 10px; }
.footer__link {
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  text-decoration: none;
  transition: color 0.2s;
}
.footer__link:hover { color: var(--color-accent); }
.footer__bottom {
  font-size: 13px;
  color: rgba(255,255,255,0.35);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.footer__policy {
  color: rgba(255,255,255,0.35);
  text-decoration: none;
  transition: color 0.2s;
}
.footer__policy:hover { color: rgba(255,255,255,0.6); }

/* === PRODUCTION SECTION === */
.production-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.production-points { display: flex; flex-direction: column; gap: 0; margin-top: 32px; }
.production-point {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}
.production-point:last-child { border-bottom: none; }
.production-point__icon {
  width: 40px; height: 40px;
  background: var(--color-accent-light);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  flex-shrink: 0;
}
.production-point__icon svg { width: 20px; height: 20px; }
.production-point__title {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: var(--weight-bold);
  color: var(--color-graphite);
  margin-bottom: 4px;
}
.production-point__text { font-size: 14px; color: var(--color-text-muted); line-height: 1.55; }

.production-photo {
  border-radius: var(--border-radius);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, #2b2b2b 0%, #1e1e1e 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
  color: rgba(255,255,255,0.3);
  border: 1px solid rgba(255,255,255,0.05);
}
.production-photo svg { width: 48px; height: 48px; opacity: 0.3; }
.production-photo__text { font-size: 13px; opacity: 0.5; text-align: center; }

/* === MAP === */
.map-section iframe {
  display: block;
  width: 100%;
  height: 420px;
  border: 0;
  border-radius: var(--border-radius);
}

/* === CATALOG GROUPS === */
.catalog-group { margin-bottom: 64px; }
.catalog-group:last-child { margin-bottom: 0; }
.catalog-group__header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--color-border);
}
.catalog-group__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-accent-light);
  border: 1px solid rgba(245,166,35,0.2);
  color: var(--color-accent-dark);
  font-size: 11px;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 6px 12px;
  border-radius: var(--border-radius-sm);
  white-space: nowrap;
}
.catalog-group__badge--hydro {
  background: #EFF6FF;
  border-color: rgba(37,99,235,0.15);
  color: #2563EB;
}

/* === UTILITIES === */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mb-8 { margin-bottom: 32px; }

/* === ANIMATIONS === */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal:nth-child(2) { transition-delay: 80ms; }
.reveal:nth-child(3) { transition-delay: 160ms; }
.reveal:nth-child(4) { transition-delay: 240ms; }
.reveal:nth-child(5) { transition-delay: 320ms; }

/* Heading reveal — more expressive */
.heading-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s cubic-bezier(0.22,1,0.36,1), transform 0.65s cubic-bezier(0.22,1,0.36,1);
}
.heading-reveal.visible { opacity: 1; transform: translateY(0); }

/* CTA pulse ring — GPU-composited (transform + opacity only) */
@keyframes pulse-ring {
  0%   { transform: scale(1);    opacity: 1; }
  50%  { transform: scale(1.04); opacity: 0.92; }
  100% { transform: scale(1);    opacity: 1; }
}
.hero__actions .btn--primary {
  animation: pulse-ring 2.8s ease-in-out infinite;
  will-change: transform;
}
.hero__actions .btn--primary:hover {
  animation: none;
  transform: translateY(-1px);
}

/* Product card category badge — accent on hover (no scale to avoid clip) */
.product-card__category {
  transition: background 0.25s ease, color 0.25s ease;
}
.product-card:hover .product-card__category {
  background: var(--color-accent);
  color: #fff;
}

/* === RESPONSIVE === */

/* Product page top grid */
.product-top-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 48px;
  align-items: start;
}

@media (max-width: 1023px) {
  .contact-grid { grid-template-columns: 1fr; }
  .production-grid { grid-template-columns: 1fr; }
  .product-top-grid { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 767px) {
  .product-top-grid { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 767px) {
  .burger { display: flex; }

  .nav {
    display: none;
    position: fixed;
    inset: 72px 0 0 0;
    background: var(--color-white);
    padding: 24px var(--container-pad);
    border-top: 1px solid var(--color-border);
    z-index: 99;
    overflow-y: auto;
  }
  .nav--open { display: block; }
  .nav__list { flex-direction: column; align-items: flex-start; gap: 0; }
  .nav__link {
    display: block;
    padding: 14px 0;
    font-size: 18px;
    border-bottom: 1px solid var(--color-border);
    width: 100%;
  }

  .header__tagline { display: none; }
  .header__phone { display: none; }

  .hero { min-height: 520px; }
  .hero__inner { grid-template-columns: 1fr; }
  .hero__slider { display: none; }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { width: 100%; justify-content: center; }
  .hero__stats { flex-direction: column; gap: 20px; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .footer__bottom { flex-direction: column; text-align: center; gap: 8px; }

  .product-hero__inner { grid-template-columns: 1fr; }
  .product-hero__image { display: none; }

  .catalog-group__header { flex-direction: column; align-items: flex-start; }
}

@media (min-width: 480px) and (max-width: 767px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .applications-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 600px) {
  .form-grid { grid-template-columns: 1fr 1fr; }
}

/* === LIGHTBOX === */
#lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9000;
  align-items: center;
  justify-content: center;
}
#lightbox.active { display: flex; }
.lb-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.92);
}
.lb-img-wrap {
  position: relative;
  z-index: 1;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lb-img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 6px;
  display: block;
  box-shadow: 0 8px 60px rgba(0,0,0,0.6);
}
.lb-close {
  position: fixed;
  top: 20px;
  right: 24px;
  z-index: 2;
  background: rgba(255,255,255,0.12);
  border: none;
  color: #fff;
  font-size: 32px;
  line-height: 1;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}
.lb-close:hover { background: rgba(255,255,255,0.25); }
.lb-prev, .lb-next {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  background: rgba(255,255,255,0.12);
  border: none;
  color: #fff;
  font-size: 40px;
  line-height: 1;
  width: 48px;
  height: 64px;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}
.lb-prev { left: 16px; }
.lb-next { right: 16px; }
.lb-prev:hover, .lb-next:hover { background: rgba(255,255,255,0.25); }