.header-menu { display:flex; align-items:center; flex:1; min-width:0; gap:.5rem; }
.header-menu .main-nav { display:block; margin-left:1rem; }
.header-menu .nav-group { gap:.1rem; }
.header-menu .header-actions { gap:.15rem; white-space:nowrap; }
.header-menu .header-actions .btn { padding-inline:.65rem; }
.nav-dropdown { position:relative; }
.nav-dropdown summary { cursor:pointer; list-style:none; gap:.65rem; color:#007daf; white-space:nowrap; border:1px solid transparent; }
.nav-dropdown summary::-webkit-details-marker { display:none; }
.header-menu .nav-group > .nav-link, .header-menu .nav-dropdown > summary { color:#000; }
.header-menu .nav-dropdown > summary .nav-chevron { color:#007daf; }
.nav-dropdown[open] > summary { background:#ebf9ff; border-color:#9bddff; }
.nav-chevron { width:6px; height:6px; border-right:1.5px solid currentColor; border-bottom:1.5px solid currentColor; transform:rotate(45deg); margin-top:-3px; }
.nav-dropdown[open] .nav-chevron { transform:rotate(225deg); margin-top:3px; }
.nav-submenu { position:absolute; top:calc(100% + .5rem); left:0; min-width:225px; max-height:calc(100dvh - 6rem); overflow:auto; padding:.55rem; border:1px solid var(--border); border-radius:1.5rem; background:#fff; box-shadow:0 12px 30px #1b34491a; }
.nav-submenu a { display:block; padding:.75rem .7rem; border-radius:.75rem; font-size:.875rem; line-height:1.5; }
.nav-submenu a:hover { background:#ebf9ff; color:#007daf; }
.nav-submenu .nav-overview { border-top:1px solid var(--border); margin-top:.4rem; color:#007daf; }
.nav-dropdown summary:focus-visible,.nav-submenu a:focus-visible,.menu-toggle:focus-visible { outline:3px solid #008cff; outline-offset:3px; }
.menu-toggle { display:none; border:1px solid var(--border); border-radius:.75rem; background:#fff; color:var(--foreground); padding:.65rem .8rem; font:inherit; cursor:pointer; align-items:center; gap:.65rem; min-height:44px; }
.hamburger { display:grid; gap:4px; width:20px; }
.hamburger span { display:block; height:2px; background:currentColor; border-radius:2px; }
@media(max-width:1279px) {
 .site-header .header-inner { height:auto; min-height:4rem; flex-wrap:wrap; padding-block:.6rem; }
 .header-inner > .logo { flex-shrink:0; }
 .nav-ready .menu-toggle { display:inline-flex; margin-left:auto; }
 .header-menu { flex-basis:100%; flex-direction:column; align-items:stretch; gap:.75rem; max-height:calc(100dvh - 5rem); overflow:auto; }
 .nav-ready .header-menu:not(.is-open) { display:none; }
 .header-menu .main-nav { margin:0; }
 .header-menu .nav-group { display:flex; flex-direction:column; align-items:stretch; }
 .header-menu .nav-link { min-height:46px; height:auto; padding:.75rem; }
 .nav-dropdown summary { justify-content:space-between; }
 .nav-submenu { position:static; min-width:0; max-height:none; box-shadow:none; border-radius:1rem; margin:.25rem .25rem .6rem; padding:.4rem; }
 .header-menu .header-actions { width:100%; margin:0; flex-wrap:wrap; justify-content:flex-start; padding:.75rem 0; border-top:1px solid var(--border); gap:.5rem; }
 .header-menu .header-actions .btn { min-height:44px; }
}