.site-header{position:sticky;top:0;background:var(--color-surface-bg);border-bottom:1px solid var(--color-border);z-index:1000}
.site-header__inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:72px}
.site-header__brand{display:flex;align-items:center;gap:0.75rem;flex-shrink:0}
.site-header__logo{height:44px;width:auto}
.site-header__brand-text{font-family:var(--font-heading);font-size:1rem;white-space:nowrap}
.site-header__toggle{display:none;flex-direction:column;justify-content:center;gap:4px;padding:0.5rem;border-radius:var(--radius-sm)}
.site-header__toggle-line{width:22px;height:2px;background:var(--color-text-primary)}
.site-header__nav{display:flex}
.site-header__menu{display:flex;align-items:center;gap:clamp(.75rem,1.5vw,1.5rem);margin:0;padding:0;list-style:none}
.site-header__menu--mobile-extra{display:none}
.site-header__link{font-size:clamp(.82rem,1.15vw,.95rem);position:relative;white-space:nowrap}
.site-header__link.is-active::after{content:"";position:absolute;left:0;bottom:-4px;width:100%;height:2px;background:var(--color-gradient-primary)}
.site-header__link--cta{padding:0.5rem 1rem;border-radius:var(--radius-sm);background:var(--color-gradient-primary);color:var(--color-text-on-gradient)}
@media(max-width:900px){
.site-header__toggle{display:flex}
.site-header__nav{position:fixed;top:72px;left:0;width:100%;max-height:calc(100vh - 72px);overflow:auto;background:var(--color-surface-bg);flex-direction:column;padding:1rem;transform:translateY(-120%);transition:transform .25s ease}
.site-header__nav.is-open{transform:translateY(0)}
.site-header__menu{flex-direction:column;align-items:flex-start;gap:1rem}
.site-header__menu--mobile-extra{display:flex}
.site-header__brand-text{display:none}
.site-header__logo{height:34px}
}