:root {
  --primary: #2563eb;
  --primary-dark: #1e3a8a;
  --accent: #60a5fa;
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-soft: #f1f5f9;
  --text: #0f172a;
  --muted: #64748b;
  --border: #dbe7f7;
  --ring: rgba(37, 99, 235, 0.22);
  --shadow-sm: 0 10px 24px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 18px 42px rgba(15, 23, 42, 0.09);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f8fafc 0%, #f5f9ff 55%, #f8fafc 100%);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; border-radius: 10px; }
.container { width: min(1160px, 92%); margin: 0 auto; }
.section { padding: clamp(2.4rem, 5vw, 4rem) 0; }
.alt-bg { background: var(--surface-soft); }

h1, h2, h3, h4 { line-height: 1.2; letter-spacing: -0.015em; margin: 0 0 .85rem; }
h1 { font-size: clamp(2rem, 4.2vw, 3.2rem); }
h2 { font-size: clamp(1.4rem, 2.5vw, 2rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1rem; color: var(--muted); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.84);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.22);
}
.header-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 76px;
}
.logo {
  display: flex;
  align-items: center;
  gap: .65rem;
  font-weight: 700;
  color: var(--primary-dark);
}
.logo img {
  width: auto;
  height: 44px;
  max-width: min(220px, 32vw);
  object-fit: contain;
  border-radius: 0;
}
.nav {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  font-weight: 600;
}
.nav a {
  position: relative;
  padding: .45rem .1rem;
  color: #334155;
  transition: color .2s ease;
}
.nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -.25rem;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s ease;
}
.nav a:hover,
.nav a.active { color: var(--primary-dark); }
.nav a:hover::after,
.nav a.active::after { transform: scaleX(1); }
.phone-btn {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--surface);
  padding: .65rem 1rem;
  border-radius: 999px;
  font-weight: 700;
  box-shadow: 0 10px 18px rgba(37, 99, 235, 0.28);
  transition: transform .2s ease, box-shadow .2s ease;
}
.phone-btn:hover { transform: translateY(-1px); box-shadow: 0 14px 26px rgba(37, 99, 235, 0.34); }
.menu-toggle { display: none; border: 0; background: transparent; color: var(--primary-dark); font-size: 1.65rem; }

.hero { position: relative; min-height: 72vh; display: grid; place-items: center; }
.hero-bg, .hero-overlay { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-bg { object-fit: cover; border-radius: 0; }
.hero-carousel {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
.hero-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
  opacity: 0;
  transition: opacity .8s ease;
}
.hero-slide.active { opacity: 1; }
.hero-overlay { background: linear-gradient(116deg, rgba(30,58,138,.92) 0%, rgba(37,99,235,.62) 50%, rgba(15,23,42,.72) 100%); }
.hero-content { position: relative; z-index: 1; color: var(--surface); text-align: left; }
.hero h1 { margin: 0 0 1rem; max-width: 820px; color: #fff; }
.hero p { max-width: 660px; font-size: 1.08rem; margin-bottom: 1.5rem; color: #dbeafe; }
.hero-actions { display: flex; gap: .85rem; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .35rem;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--surface);
  border: 0;
  padding: .78rem 1.15rem;
  border-radius: .78rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
  box-shadow: 0 10px 20px rgba(37, 99, 235, 0.2);
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 14px 26px rgba(30, 58, 138, 0.25); }
.btn:focus-visible,
.filter-btn:focus-visible,
input:focus-visible,
textarea:focus-visible,
.menu-toggle:focus-visible,
.phone-btn:focus-visible,
.nav a:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--ring);
}
.btn-secondary {
  background: var(--surface);
  color: var(--primary-dark);
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover { filter: brightness(0.98); }
.text-link { color: var(--primary); font-weight: 600; }
.lead { font-size: 1.08rem; max-width: 860px; color: #475569; }

.cards { display: grid; gap: 1rem; }
.four-col { grid-template-columns: repeat(4, minmax(0,1fr)); }
.three-col { grid-template-columns: repeat(3, minmax(0,1fr)); }
.two-col { grid-template-columns: repeat(2, minmax(0,1fr)); }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.2rem;
  box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.gallery-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 1rem; }
.gallery-img { cursor: zoom-in; aspect-ratio: 4/3; object-fit: cover; transition: transform .25s ease, box-shadow .25s ease; }
.gallery-img:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.88);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 150;
}
.lightbox.open { display: flex; }
.lightbox img { max-height: 86vh; max-width: min(1200px, 92vw); border-radius: 12px; }
.close {
  position: absolute;
  top: 16px;
  right: 20px;
  color: var(--surface);
  background: transparent;
  border: 0;
  font-size: 2rem;
  cursor: pointer;
}

.page-main { min-height: calc(100vh - 170px); }
.catalog-controls { display: grid; gap: 1rem; }
#productSearch {
  padding: .82rem .92rem;
  border: 1px solid #c7d5ea;
  border-radius: .82rem;
  font-size: 1rem;
  width: 100%;
  background: #fff;
  color: var(--text);
}
.filters { display: flex; flex-wrap: wrap; gap: .55rem; }
.filter-btn {
  border: 1px solid #bfd2f3;
  background: var(--surface);
  color: var(--primary-dark);
  padding: .52rem .9rem;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  transition: all .2s ease;
}
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.active { background: var(--primary); border-color: var(--primary); color: var(--surface); }
.product-card img { aspect-ratio: 4/3; object-fit: cover; margin-bottom: .8rem; }

.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 2rem 1.2rem;
  border: 1px dashed #bfd2f3;
  background: #f8fbff;
  border-radius: 1rem;
  color: var(--muted);
}

.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  background: var(--surface);
  padding: 1.3rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  box-shadow: var(--shadow-sm);
}
.spec-list { padding-left: 1rem; color: #334155; }
.article img { margin: 1rem 0; aspect-ratio: 16/7; object-fit: cover; }
.article-meta { color: var(--muted); font-size: .95rem; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.contact-form label { display: grid; gap: .45rem; margin-bottom: .78rem; font-weight: 600; color: #334155; }
.contact-form input,
.contact-form select,
.contact-form textarea {
  padding: .74rem .8rem;
  border: 1px solid #c7d5ea;
  border-radius: .78rem;
  font: inherit;
  background: #fff;
}
.contact-form textarea { resize: vertical; min-height: 130px; }
iframe { width: 100%; min-height: 320px; border: 0; border-radius: 12px; }

.site-footer {
  background: radial-gradient(circle at top, #234ba9 0%, var(--primary-dark) 62%);
  color: var(--surface);
  margin-top: 2.2rem;
}
.site-footer p,
.site-footer a,
.site-footer li { color: #dbeafe; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 1rem; padding: 2.2rem 0; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: .5rem; }
.footer-seo-block {
  border-top: 1px solid rgba(219, 234, 254, 0.24);
  padding: 0 0 2rem;
}
.footer-seo-text {
  max-width: 920px;
  margin-bottom: .9rem;
  color: #bfdbfe !important;
}
.footer-glass-form {
  display: grid;
  grid-template-columns: 1fr;
  gap: .75rem;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.25);
  backdrop-filter: blur(10px);
  border-radius: 14px;
  padding: .95rem;
}
.footer-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .7rem;
}
.footer-glass-form label {
  display: grid;
  gap: .4rem;
  color: #f1f5f9;
  font-weight: 600;
}
.footer-glass-form input {
  width: 100%;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 10px;
  padding: .68rem .75rem;
  font: inherit;
  color: #0f172a;
}
.footer-glass-form select,
.footer-glass-form textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 10px;
  padding: .68rem .75rem;
  font: inherit;
  color: #0f172a;
}
.footer-glass-form textarea { resize: vertical; min-height: 90px; }
.footer-glass-form button {
  border: 0;
  background: linear-gradient(135deg, #60a5fa, #1d4ed8);
  color: #fff;
  border-radius: 10px;
  font-weight: 700;
  padding: .72rem 1rem;
  cursor: pointer;
}
.whatsapp-btn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #22c55e;
  color: var(--surface);
  padding: .68rem 1rem;
  border-radius: 999px;
  font-weight: 700;
  box-shadow: 0 12px 22px rgba(34, 197, 94, .3);
  z-index: 110;
  transition: transform .2s ease, box-shadow .2s ease;
}
.whatsapp-btn:hover { transform: translateY(-1px); box-shadow: 0 16px 26px rgba(34, 197, 94, .36); }

@media (max-width: 980px) {
  .four-col, .three-col { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .gallery-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .nav {
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, .98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: .95rem 4%;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: .85rem;
  }
  .nav.open { display: flex; }
  .menu-toggle { display: block; }
  .phone-btn { display: none; }
}

@media (max-width: 680px) {
  .two-col,
  .four-col,
  .three-col,
  .product-detail,
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-form-grid { grid-template-columns: 1fr; }
  .footer-glass-form { grid-template-columns: 1fr; }
  .section { padding: 2.15rem 0; }
}

.about-intro-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 1rem;
}

.section-tag {
  display: inline-block;
  margin-bottom: .75rem;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .15em;
  color: var(--primary);
  font-weight: 700;
}

.about-main-card {
  padding: 1.6rem;
}

.about-dark-card {
  padding: 1.6rem;
  background: linear-gradient(145deg, #0f172a, #1e3a8a);
  border-color: #1e3a8a;
}

.about-dark-card h2,
.about-dark-card p {
  color: #e2e8f0;
}

.about-metrics-wrap {
  border-radius: 1rem;
}

.metric-card {
  text-align: center;
}

.metric-value {
  margin-bottom: .5rem;
  color: var(--primary-dark);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
}

.metric-label {
  margin: 0;
  color: #334155;
  font-weight: 600;
}

.service-pill {
  text-align: center;
  font-weight: 700;
}

.about-highlight {
  text-align: center;
  padding: clamp(1.5rem, 3.5vw, 2.4rem);
  border: 1px solid #bfd2f3;
  background: linear-gradient(135deg, #eff6ff, #ffffff);
}

.about-highlight .btn {
  margin-top: .7rem;
}

@media (max-width: 980px) {
  .about-intro-grid {
    grid-template-columns: 1fr;
  }
}