.site-header { position: sticky; z-index: 40; top: 0; border-bottom: 1px solid rgba(51, 51, 51, .08); background: rgba(255, 255, 255, .95); backdrop-filter: blur(18px); }
.site-header__inner { display: flex; align-items: center; justify-content: space-between; width: min(1280px, calc(100% - 40px)); min-height: 76px; margin: 0 auto; gap: 24px; }
.site-logo { display: inline-flex; flex: 0 0 auto; align-items: center; width: 154px; }
.site-logo img { display: block; width: 100%; height: auto; object-fit: contain; }
.site-navigation__list { display: flex; align-items: center; gap: 30px; margin: 0; padding: 0; list-style: none; }
.site-navigation a, .nav-products__trigger { color: var(--color-text); font-size: .86rem; font-weight: 750; }
.site-navigation a:hover, .nav-products__trigger:hover { color: var(--color-primary); }
.nav-products { position: relative; display: flex; align-items: center; }
.nav-products__link { padding: 27px 0; }
.nav-products__trigger { display: inline-flex; align-items: center; padding: 27px 0 27px 8px; border: 0; background: transparent; cursor: pointer; }
.nav-products__trigger::after { width: 6px; height: 6px; margin-top: -3px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; content: ""; transform: rotate(45deg); transition: transform .22s ease, margin .22s ease; }
.nav-products:hover .nav-products__trigger::after, .nav-products:focus-within .nav-products__trigger::after, .nav-products.is-open .nav-products__trigger::after { margin-top: 3px; transform: rotate(225deg); }

/* Desktop product mega menu. */
.product-mega-menu { position: absolute; top: calc(100% + 8px); left: 50%; display: grid; grid-template-columns: 220px minmax(760px, 1fr); width: min(1120px, calc(100vw - 40px)); padding: 24px; border: 1px solid var(--color-line); border-radius: 18px; visibility: hidden; opacity: 0; background: #fff; box-shadow: var(--shadow); transform: translate(-50%, 10px); transition: opacity .22s ease, transform .22s ease, visibility .22s ease; }
.nav-products:hover .product-mega-menu, .nav-products:focus-within .product-mega-menu, .nav-products.is-open .product-mega-menu { visibility: visible; opacity: 1; transform: translate(-50%, 0); }
.product-mega-menu__intro { padding: 18px; border-radius: 14px; color: #fff; background: var(--color-primary); }
.product-mega-menu__intro .eyebrow { color: #d7e6ed; }
.product-mega-menu__intro p:not(.eyebrow) { font-size: .85rem; }
.product-mega-menu__intro a { color: #fff; font-size: .83rem; font-weight: 800; }
.product-mega-menu__intro a:hover, .product-mega-menu__intro a:focus-visible { color: #fff; text-decoration: underline; text-underline-offset: 4px; }
.product-mega-menu__groups { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px 18px; padding: 5px 0 5px 26px; }
.product-mega-menu__groups section { display: grid; align-content: start; gap: 8px; }
.product-mega-menu__groups a { font-size: .78rem; color: var(--color-muted); }
.product-mega-menu__groups a:hover, .product-mega-menu__groups a:focus-visible { color: var(--color-primary); text-decoration: underline; text-underline-offset: 3px; }
.product-mega-menu__groups .product-mega-menu__title { margin-bottom: 4px; color: var(--color-text); font-size: .84rem; font-weight: 800; line-height: 1.25; }
.mobile-product-menu { display: none; }
.button--header { min-height: 42px; padding: 9px 16px; font-size: .73rem; white-space: nowrap; }
.nav-toggle { display: none; }

/* Compact navigation uses its own simple two-level list. It never renders the
   desktop mega menu, eliminating desktop/mobile style collisions. */
@media (max-width: 900px) {
  .site-header__inner { width: min(100% - 32px, 1280px); min-height: 68px; }
  .site-logo { width: 130px; }
  .nav-toggle { display: grid; gap: 4px; width: 42px; height: 42px; place-content: center; padding: 0; border: 0; border-radius: 50%; background: var(--color-soft); }
  .nav-toggle span:not(.sr-only) { width: 18px; height: 2px; background: var(--color-text); }
  .site-navigation { position: absolute; top: calc(100% + 1px); right: 0; left: 0; display: none; max-height: calc(100vh - 69px); overflow-y: auto; padding: 18px 16px; border-bottom: 1px solid var(--color-line); background: #fff; }
  .site-header.is-menu-open .site-navigation { display: block; }
  .site-navigation__list { display: grid; gap: 0; }
  .site-navigation__list > li { border-bottom: 1px solid var(--color-line); }
  .site-navigation__list > li > a { display: flex; width: 100%; justify-content: space-between; padding: 15px 0; }
  .nav-products__link { flex: 1; padding: 15px 0; }
  .nav-products__trigger { width: 42px; justify-content: flex-end; padding: 15px 0 15px 12px; }
  .product-mega-menu { display: none !important; }
  .mobile-product-menu { display: none; }
  .site-header.is-menu-open .nav-products.is-open > .mobile-product-menu { display: grid; gap: 15px; padding: 4px 0 18px; }
  .mobile-product-menu__group { display: grid; gap: 8px; padding-top: 14px; border-top: 1px solid var(--color-line); }
  .mobile-product-menu__title { display: block; padding: 2px 0 5px; color: var(--color-primary) !important; font-size: .95rem !important; font-weight: 800 !important; line-height: 1.35; }
  .mobile-product-menu__group a:not(.mobile-product-menu__title) { display: block; padding: 4px 0 4px 14px; color: var(--color-muted) !important; font-size: .88rem !important; line-height: 1.4; }
  .button--header { display: none; }
}