/* Reference-led compact two-tier header. Existing menu/search controls retained. */
.site-header .header-utility{background:#0f1b32;color:#b5c1d3}
.site-header .header-utility__inner{min-height:32px;gap:1rem;font-size:.625rem}
.site-header .header-utility nav{height:32px;gap:1rem}
.site-header .header-utility a{padding:0;border:0;color:#bdc9da}
.site-header .header-utility a:hover{background:transparent;color:#fff}
.site-header .header-utility__tools a{padding:.2rem .625rem;border:1px solid #40506a;border-radius:.25rem;font-size:.625rem;text-transform:uppercase;letter-spacing:.08em;height:auto}
.site-header .header-primary{background:rgba(255,255,255,.97);border-color:var(--border)}
.site-header .header-main{display:flex;min-height:78px;align-items:center;gap:1.25rem}
.site-header .site-branding{flex:0 0 auto;gap:1rem}
.site-header .site-logo,.site-header .custom-logo-link{width:175px;height:36px}
.header-brand-caption{margin:0;padding-left:1rem;border-left:1px solid var(--border);color:var(--text-muted);font-size:.5625rem;font-weight:600;line-height:1.5;text-transform:uppercase;letter-spacing:.08em}
.site-header .primary-nav{margin-left:auto;align-self:stretch}
.site-header .primary-menu{align-items:center;gap:.25rem}
.site-header .primary-menu>li{height:100%}
.site-header .primary-menu>li>a{padding-inline:.75rem;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.035em}
.site-header .primary-menu>li>a:after{bottom:0;right:.75rem;left:.75rem;height:2px;background:var(--primary)}
.site-header .primary-menu .sub-menu{border-top:2px solid var(--primary);border-radius:0 0 .5rem .5rem}
.site-header .primary-menu .sub-menu a{font-size:.8125rem}
.site-header .header-actions{flex:0 0 auto;gap:.5rem}
.site-header .search-toggle span{display:none}
.site-header .header-inline-search{display:none}
.site-header a.header-samples{display:flex;align-items:center;justify-content:center;width:42px;height:42px;color:var(--text);text-decoration:none}
.site-header a.header-samples:hover{color:var(--primary)}
.site-header .search-panel{top:100%}
@media(min-width:1440px){
 .site-header .header-inline-search{display:block;flex:0 1 250px;min-width:180px}
 .header-inline-search .search-form{position:relative;gap:0}
 .header-inline-search .search-form label{min-width:0}
 .header-inline-search .search-field{min-height:42px;padding:.625rem 2.5rem .625rem 1rem;border:1px solid var(--border);border-radius:999px;background:var(--surface);font-size:.75rem}
 .header-inline-search .header-search-submit{position:absolute;right:.25rem;top:0;width:38px;height:42px;border:0;background:transparent;color:var(--primary);cursor:pointer}
 .site-header .search-toggle{display:none}
}
@media(min-width:1025px) and (max-width:1279px){.header-brand-caption{display:none}.site-header .header-main{gap:.75rem}.site-header .primary-menu>li>a{padding-inline:.625rem}}
@media(max-width:1024px){
 .site-header .header-utility{display:none}
 .site-header .header-main{min-height:68px;gap:.75rem}
 .site-header .primary-nav{margin:0;align-self:auto}
 .site-header .primary-menu{align-items:stretch}
 .site-header .primary-menu>li{height:auto}
 .site-header .primary-menu>li>a{padding:.875rem 0;font-size:.875rem}
 .site-header .header-actions{margin-left:auto}
 .site-header .search-toggle,.site-header .menu-toggle{display:flex}
 .site-header .search-panel{top:68px}
 .site-header .primary-menu .sub-menu{border:0;border-radius:0}
}
@media(max-width:640px){
 .site-header .header-main{min-height:64px}
 .site-header .site-logo,.site-header .custom-logo-link{width:155px;height:36px}
 .header-brand-caption{display:none}
 .site-header .header-actions{gap:0}
 .site-header a.header-samples{width:36px}
 .site-header .search-panel{top:64px}
}