:root {
  color-scheme: dark;
  --bg: #07111f;
  --bg-soft: #0f1d33;
  --surface: #14233d;
  --text: #f5f7fb;
  --muted: #9fb0c8;
  --accent: #62d0ff;
  --accent-strong: #2b8cff;
  --border: rgba(255, 255, 255, 0.12);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background: linear-gradient(135deg, var(--bg), var(--bg-soft));
  color: var(--text);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 2rem;
  position: sticky;
  top: 0;
  backdrop-filter: blur(12px);
  background: rgba(7, 17, 31, 0.8);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}
.brand { font-size: 1.25rem; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; }
.nav-links { display: flex; gap: 1.25rem; color: var(--muted); }
.nav-links a:hover { color: var(--text); }
.menu-toggle { display: none; background: transparent; border: 0; color: var(--text); font-size: 1.5rem; cursor: pointer; }
main { width: min(1120px, calc(100% - 2rem)); margin: 0 auto; }
.hero {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 2rem;
  padding: 4rem 0 3rem;
  align-items: center;
}
.eyebrow { display: inline-block; margin-bottom: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.14em; color: var(--accent); font-size: 0.82rem; }
h1, h2, h3 { margin: 0 0 0.75rem; }
h1 { font-size: clamp(2rem, 3.5vw, 3.4rem); line-height: 1.1; }
.hero-copy, .about-copy, .contact-box p, .card p { color: var(--muted); }
.hero-actions { display: flex; justify-content: center; gap: 1rem; margin-top: 1.5rem; flex-wrap: wrap; }
.button {
  display: inline-block;
  padding: 0.9rem 1.2rem;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.button:hover { transform: translateY(-2px); }
.button.primary { background: linear-gradient(135deg, var(--accent), var(--accent-strong)); color: #02111f; box-shadow: 0 10px 25px rgba(43, 140, 255, 0.25); }
.button.secondary { border: 1px solid var(--border); background: rgba(255, 255, 255, 0.04); }
.hero-card, .card, .contact-box {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 1.5rem;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.2);
}
.hero-card ul { margin: 0; padding-left: 1rem; color: var(--muted); }
.section { padding: 3rem 0; }
.light-section { background: rgba(255, 255, 255, 0.03); border: 1px solid var(--border); border-radius: 24px; padding: 2rem; }
.page-section { padding: 4rem 0 3rem; }
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; margin-top: 1.5rem; }
.card h3 { color: var(--accent); }
.contact-box { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
footer { text-align: center; color: var(--muted); padding: 1.5rem 0 2rem; }
.product-shell {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.5rem;
  margin-top: 2rem;
  align-items: start;
}
.cables-section {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.section-heading {
  margin-bottom: 1.25rem;
}
.cable-shell {
  grid-template-columns: 1fr;
  gap: 1rem;
}
.cable-gallery {
  flex-direction: row;
}
.cable-info {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.25rem;
}
.product-gallery {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 1rem;
}
.gallery-stage {
  flex: 1;
  min-height: 360px;
  border-radius: 20px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(98, 208, 255, 0.16), rgba(43, 140, 255, 0.08));
}
.gallery-stage img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  max-height: 360px;
  padding: 0.75rem;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.gallery-stage img:hover {
  transform: scale(1.02);
  opacity: 0.95;
}
.gallery-nav {
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #02111f;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: 0 10px 20px rgba(43, 140, 255, 0.2);
}
.gallery-nav:hover { transform: translateY(-2px); }
.product-details {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 1.5rem;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.18);
}
.product-badge {
  display: inline-block;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: rgba(98, 208, 255, 0.14);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.75rem;
}
.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}
.product-tags span {
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.84rem;
}
.product-thumbnails {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}
.product-thumbnails button {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.25rem;
  cursor: pointer;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.product-thumbnails button.active {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.product-thumbnails img {
  width: 72px;
  height: 72px;
  object-fit: cover;
  border-radius: 10px;
}
@media (max-width: 800px) { .hero { grid-template-columns: 1fr; } .cards { grid-template-columns: 1fr; } .product-shell { grid-template-columns: 1fr; } .cable-shell { grid-template-columns: 1fr; } }
@media (max-width: 640px) {
  .topbar { padding: 1rem 1rem; }
  .menu-toggle { display: block; }
  .nav-links { display: none; position: absolute; top: 100%; right: 1rem; flex-direction: column; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 0.8rem 1rem; }
  .nav-links.open { display: flex; }
  .hero { padding-top: 2rem; }
}