.site-header{position:sticky;top:0;z-index:50}
.promo-bar{background:var(--surface-secondary);border-bottom:1px solid var(--border-light);font-size:var(--fs-small)}
.promo-inner{padding:0.4rem 0;text-align:center}
.header-main{backdrop-filter:blur(12px)}
.header-row{display:flex;align-items:center;justify-content:space-between;gap:var(--space-sm);min-height:72px}
.brand{display:flex;align-items:center;gap:0.6rem;flex-shrink:0}
.brand-mark{height:52px;width:auto}
.brand-text{font-family:var(--font-heading);font-size:1.1rem}
.nav{display:flex}
.nav-list{display:flex;gap:1.2rem;list-style:none;margin:0;padding:0;align-items:center}
.nav-list li{margin:0;padding:0}
.nav-list a{font-size:0.95rem}
.header-actions{display:flex;align-items:center}
.nav-toggle{display:none;flex-direction:column;gap:4px;padding:0.5rem}
.nav-toggle span{width:22px;height:2px;background:var(--text-primary);display:block}

@media (max-width:900px){
.nav{position:fixed;top:72px;left:0;width:100%;background:var(--surface-primary);border-top:1px solid var(--border-light);max-height:calc(100vh - 72px);overflow:auto;transform:translateY(-10px);opacity:0;pointer-events:none;transition:all var(--transition)}
.nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
.nav-list{flex-direction:column;align-items:flex-start;padding:var(--space-md)}
.nav-toggle{display:flex}
.brand-text{display:none}
}