.site-header{position:sticky;top:0;background:var(--color-surface-primary);border-bottom:1px solid var(--color-border);z-index:1000}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:72px;gap:var(--space-2)}
.brand-link{display:flex;align-items:center;gap:0.6rem}
.brand-logo{height:44px;width:auto}
.brand-text{font-family:var(--font-heading);font-size:1.2rem}

.nav-toggle{display:none;padding:0.5rem}
.nav-toggle-line{width:22px;height:2px;background:var(--color-text-primary)}

.site-nav{display:flex;align-items:center;gap:var(--space-3)}
.nav-list{display:flex;gap:var(--space-3);margin:0;padding:0}
.nav-list li{margin:0;padding:0}
.nav-list a{font-size:var(--text-sm)}
.nav-actions{display:flex}

@media(max-width:800px){
  .nav-toggle{display:flex}
  .site-nav{position:absolute;top:100%;left:0;width:100%;flex-direction:column;align-items:flex-start;background:var(--color-surface-primary);border-bottom:1px solid var(--color-border);padding:var(--space-3);display:none}
  .site-nav.open{display:flex}
  .nav-list{flex-direction:column;width:100%}
  .nav-actions{width:100%}
}