@media (max-width:1080px){
  .site-nav{position:fixed;inset:78px 0 auto;background:#f8fbff;border-bottom:1px solid var(--line);padding:18px 20px;display:none;flex-direction:column;align-items:stretch;box-shadow:var(--shadow-sm)}
  .site-nav.open{display:flex}.site-nav a{padding:12px}.menu-toggle{display:grid;place-items:center;margin-left:auto}.header-inner>.nav-actions{display:none}
  .hero-grid,.split{grid-template-columns:1fr}.hero-grid{gap:50px}.hero-copy{max-width:800px}.browser-frame{transform:none}
  .grid-4{grid-template-columns:repeat(2,1fr)}.gallery-grid,.feature-catalog{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr}.footer-col:last-child{grid-column:2/-1}.architecture{grid-template-columns:1fr}.arch-arrow{transform:rotate(90deg)}
}
@media (max-width:760px){
  .container,.narrow{width:min(calc(100% - 28px),var(--container))}.header-inner{height:68px}.site-nav{inset:68px 0 auto}.brand img{width:142px}.hero{padding:68px 0 58px}.page-hero{padding:58px 0 44px}
  h1{font-size:2.65rem}.section{padding:64px 0}.section-head{align-items:flex-start;flex-direction:column}
  .grid-2,.grid-3,.grid-4,.gallery-grid,.feature-catalog,.calc-grid,.form-grid,.footer-grid{grid-template-columns:1fr}.footer-col:last-child{grid-column:auto}
  .stats{grid-template-columns:1fr 1fr}.stat{padding:20px}.float-card{display:none}.card{padding:22px}
  .gallery-item{border-radius:15px}.lightbox{padding:64px 12px 20px}.lightbox-prev{left:7px}.lightbox-next{right:7px}.lightbox-control{width:42px;height:42px}
  .cta{padding:34px 26px}.footer-bottom{flex-direction:column}.form-grid .field{grid-column:1}
}
@media (max-width:460px){
  .stats{grid-template-columns:1fr}.hero-actions .btn,.button-row .btn{width:100%}.card{border-radius:18px}.site-footer{padding-top:48px}
}