.site-header{position:sticky;top:0;z-index:40;background:linear-gradient(to bottom,rgba(2,5,4,0.96),rgba(2,5,4,0.92),rgba(2,5,4,0.9));backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid rgba(148,163,184,0.3)}.site-header-inner{display:flex;align-items:center;justify-content:space-between;padding-top:var(--space-3);padding-bottom:var(--space-3)}.brand-lockup{display:flex;align-items:center;gap:var(--space-3)}.brand-mark{width:32px;height:32px;border-radius:12px;border:1px solid rgba(148,163,184,0.5);display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at 20% 0%,rgba(16,185,129,0.4),rgba(2,5,4,1));box-shadow:0 12px 30px rgba(0,0,0,0.7);font-family:var(--font-serif);font-size:0.95rem;color:var(--color-text-primary)}.brand-text{display:flex;flex-direction:column}.brand-name{font-family:var(--font-serif);letter-spacing:0.16em;text-transform:uppercase;font-size:0.78rem;color:var(--color-text-primary)}.brand-subtitle{font-size:0.7rem;letter-spacing:0.18em;text-transform:uppercase;color:var(--color-text-muted)}.main-nav{display:flex;align-items:center;gap:var(--space-6);font-size:0.85rem;text-transform:uppercase;letter-spacing:0.16em}.nav-list{display:flex;align-items:center;gap:var(--space-5);margin:0}.nav-item{display:flex;align-items:center}.nav-link{position:relative;color:var(--color-text-muted);padding-bottom:0.35rem}.nav-link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:linear-gradient(90deg,#10b981,#6fbfa5);transition:width var(--transition-base)}.nav-link:hover{color:var(--color-text-primary)}.nav-link:hover::after{width:100%}.nav-link-active{color:var(--color-text-primary)}.nav-link-active::after{width:55%}.nav-cta{margin-left:var(--space-1)}.nav-cta-item{margin-left:var(--space-2)}.nav-toggle{display:none;flex-direction:column;background:transparent;border-radius:999px;border:1px solid rgba(148,163,184,0.5);padding:0.35rem 0.5rem;align-items:center;justify-content:center;gap:0.22rem}.nav-toggle span{display:block;width:16px;height:1px;border-radius:999px;background:var(--color-text-primary);transition:transform var(--transition-base),opacity var(--transition-base)}.nav-toggle.is-active span:nth-child(1){transform:translateY(3px) rotate(45deg)}.nav-toggle.is-active span:nth-child(2){opacity:0}.nav-toggle.is-active span:nth-child(3){transform:translateY(-3px) rotate(-45deg)}@media (max-width:768px){.main-nav{position:fixed;inset:64px 0 auto 0;background:rgba(2,5,4,0.98);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid rgba(148,163,184,0.2);padding:var(--space-4) var(--space-4) var(--space-6);display:none;justify-content:center}.main-nav.is-open{display:flex;animation:navFadeIn var(--transition-slow)}.nav-list{flex-direction:column;align-items:flex-start;width:100%;max-width:1120px;margin:0 auto}.nav-item{width:100%}.nav-link{display:block;width:100%;padding-top:var(--space-2);padding-bottom:var(--space-2);padding-inline:var(--space-2)}.nav-cta-item{margin-left:0;margin-top:var(--space-3)}.nav-cta{width:100%;justify-content:center}.nav-toggle{display:inline-flex}.site-header-inner{gap:var(--space-3)}}@keyframes navFadeIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}