.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; align-items: center; flex: 0 0 auto; }
.site-logo__image { display: block; width: 132px; height: 68px; object-fit: contain; }
.site-navigation__list { display: flex; align-items: center; gap: 28px; 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; }
.nav-products__control { display: flex; align-items: center; }
.nav-products__link { padding: 27px 5px 27px 0; }
.nav-products__trigger { position: relative; display: grid; width: 30px; height: 42px; place-items: center; padding: 0; border: 0; border-radius: 50%; background: transparent; }
.nav-products__trigger::after { width: 7px; height: 7px; margin-top: -4px; 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: 4px; transform: rotate(225deg); }
.product-mega-menu { position: fixed; top: 84px; left: 50%; display: grid; grid-template-columns: 240px minmax(0, 1fr); width: min(1050px, calc(100vw - 32px)); 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: 20px; 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: .84rem; }
.product-mega-menu__intro a { color: #fff; font-size: .82rem; font-weight: 800; }
.product-mega-menu__groups { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; padding: 4px 0 4px 24px; }
.product-mega-menu__category { display: grid; align-content: center; min-height: 70px; padding: 12px 14px; border: 1px solid var(--color-line); border-radius: 12px; background: #fff; transition: border-color .2s ease, background .2s ease, transform .2s ease; }
.product-mega-menu__category:hover { border-color: rgba(0,119,255,.35); background: var(--color-soft); transform: translateY(-2px); }
.product-mega-menu__category span { color: var(--color-text); font-size: .86rem; font-weight: 800; }
.product-mega-menu__category small { margin-top: 4px; color: var(--color-muted); font-size: .7rem; font-weight: 650; }
.button--header { min-height: 42px; padding: 9px 16px; font-size: .73rem; white-space: nowrap; }
.nav-toggle { display: none; }
@media (max-width: 900px) {
    .site-header__inner { width: min(100% - 32px, 1280px); min-height: 68px; }
    .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 - 68px); padding: 18px 16px; overflow-y: auto; 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%; padding: 15px 0; }
    .nav-products__control { justify-content: space-between; }
    .nav-products__link { display: flex; flex: 1; padding: 15px 0; }
    .nav-products__trigger { width: 48px; height: 48px; flex: 0 0 48px; }
    .product-mega-menu { position: static; display: none; width: 100%; grid-template-columns: 1fr; padding: 0 0 18px; border: 0; border-radius: 0; box-shadow: none; visibility: visible; opacity: 1; transform: none; }
    .nav-products:hover .product-mega-menu, .nav-products:focus-within .product-mega-menu, .nav-products.is-open .product-mega-menu { transform: none; }
    .nav-products.is-open .product-mega-menu { display: grid; }
    .product-mega-menu__intro { display: none; }
    .product-mega-menu__groups { grid-template-columns: 1fr 1fr; padding: 0; }
    .product-mega-menu__category { min-height: 64px; }
    .button--header { display: none; }
}
@media (max-width: 560px) { .product-mega-menu__groups { grid-template-columns: 1fr; } }