.header{position:sticky;top:0;z-index:var(--z-sticky);background-color:var(--color-bg-primary);border-bottom:1px solid var(--color-border-primary);transition:background-color var(--transition-base),box-shadow var(--transition-base),backdrop-filter var(--transition-base)}.header-scrolled{background:rgba(10,10,10,.85);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:var(--shadow-lg)}.header-content{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-4) 0}.logo{display:inline-flex;align-items:center;min-height:2.75rem;font-size:var(--font-size-2xl);font-weight:var(--font-weight-extrabold);color:var(--color-text-primary);text-decoration:none;transition:transform var(--transition-base)}.logo:hover{transform:scale(1.02)}.logo-text{align-items:center;gap:var(--spacing-2)}.logo-text,.nav-desktop,.nav-list{display:flex}.nav-list{flex-wrap:wrap;align-items:center;column-gap:var(--spacing-8);row-gap:var(--spacing-3);list-style:none;margin:0;padding:0}.nav-link{display:inline-flex;align-items:center;min-height:2.75rem;padding:var(--spacing-1) 0;color:var(--color-text-secondary);font-weight:var(--font-weight-medium);font-size:var(--font-size-base);transition:color var(--transition-base);position:relative}.nav-link:after{content:"";position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--color-accent-gold);transition:width var(--transition-base)}.nav-link:hover{color:var(--color-accent-gold)}.nav-link:hover:after{width:100%}.nav-link-active{color:var(--color-accent-gold)}.nav-link-active:after{width:100%}.header-actions{display:flex;align-items:center;gap:var(--spacing-4)}@media (max-width:768px){.nav-desktop{display:none}}