.gu-header{backdrop-filter:blur(16px);background:rgba(248,250,252,0.96);border-bottom:1px solid rgba(148,163,184,0.45)}.gu-brand{gap:12px}.gu-brand-mark{min-width:26px;min-height:26px;border-radius:12px;background:radial-gradient(circle at 20% 0%,var(--color-accent-neon),transparent 55%),linear-gradient(135deg,var(--color-primary),var(--color-accent-violet));box-shadow:0 0 0 1px rgba(148,163,184,0.45),0 0 20px rgba(56,189,248,0.55)}.gu-brand-text{display:flex;flex-direction:column;gap:2px}.gu-brand-kicker{font-size:0.6rem;letter-spacing:0.18em;text-transform:uppercase;color:var(--color-text-muted)}.gu-brand-name{font-family:var(--font-display);font-size:0.98rem;letter-spacing:0.16em;text-transform:uppercase;color:var(--gray-900)}.gu-header-left{display:flex;align-items:center;min-width:0}.gu-header-right{display:flex;align-items:center;gap:16px;justify-content:flex-end;flex:1}.gu-site-nav{font-size:0.9rem}.gu-nav-link{font-weight:500}.gu-nav-link.is-active{color:var(--gray-900)}.gu-nav-secondary{min-width:160px;max-width:260px;width:100%}.gu-nav-search input{font-size:0.7rem}.gu-nav-toggle{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:999px;border:1px solid rgba(148,163,184,0.85);background:rgba(248,250,252,0.95);cursor:pointer;transition:background-color var(--transition-base) ease,transform var(--transition-fast) ease,box-shadow var(--transition-base) ease}.gu-nav-toggle:focus-visible{outline:2px solid var(--color-accent-neon);outline-offset:3px}.gu-nav-toggle:hover{box-shadow:var(--shadow-sm);background:#f9fafb}.gu-nav-toggle.is-open{background:var(--gray-900);border-color:var(--gray-900)}.gu-nav-toggle.is-open .nav-toggle-bar{background:#f9fafb;box-shadow:0 0 0 #f9fafb,0 0 0 #f9fafb;transform:rotate(45deg)}.gu-nav-toggle.is-open .nav-toggle-bar::after{transform:rotate(-90deg)}.gu-nav-toggle .nav-toggle-bar{position:relative;width:15px;height:2px;border-radius:999px;background:var(--gray-700);box-shadow:0 5px 0 var(--gray-700),0 -5px 0 var(--gray-700);transition:background-color var(--transition-base) ease,box-shadow var(--transition-base) ease,transform var(--transition-base) ease}.gu-nav-toggle .nav-toggle-bar::after{content:"";position:absolute;inset:0;border-radius:inherit;background:inherit;transition:transform var(--transition-base) ease}@media (max-width:1023.98px){.gu-nav-secondary{display:none}.gu-site-nav{width:100%;max-width:480px;margin:0 auto;border-radius:16px 16px 24px 24px;box-shadow:0 22px 45px rgba(15,23,42,0.45)}.gu-site-nav .gu-nav-link{width:100%;padding:8px 4px;border-radius:10px;color:#e5e7eb}.gu-site-nav .gu-nav-link:focus-visible{outline:2px solid var(--color-accent-neon);outline-offset:3px}.gu-site-nav .gu-nav-link.is-active{color:#f9fafb;font-weight:600}.gu-site-nav .gu-nav-link+.gu-nav-link{margin-top:2px}.gu-site-nav::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 0 0,rgba(56,189,248,0.35),transparent 55%),radial-gradient(circle at 100% 0,rgba(124,58,237,0.4),transparent 60%);mix-blend-mode:screen;opacity:0.7;pointer-events:none}}@media (min-width:1024px){.gu-nav-toggle{display:none}.gu-site-nav{align-items:center;gap:20px}.gu-nav-secondary{display:flex}}