.site-header{position:sticky;top:0;z-index:40;background:rgba(249,250,251,0.95);backdrop-filter:blur(16px);border-bottom:1px solid rgba(148,163,184,0.18)}.site-header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:var(--header-height)}.brand{display:inline-flex;align-items:center;gap:0.6rem;color:var(--color-neutral-900)}.brand-mark{width:1.9rem;height:1.9rem;border-radius:0.9rem;background:conic-gradient(from 220deg,#0ea5e9,#22c55e,#6366f1,#0ea5e9);display:flex;align-items:center;justify-content:center;box-shadow:0 8px 20px rgba(56,189,248,0.55);color:#ffffff;font-size:0.85rem;font-weight:800;flex-shrink:0}.brand-text{display:flex;flex-direction:column}.brand-name{font-weight:700;font-size:0.98rem;letter-spacing:-0.02em}.brand-sub{font-size:0.7rem;font-weight:500;color:var(--color-text-muted)}.nav-wrapper{display:flex;align-items:center;margin-left:auto;margin-right:1.25rem}.nav-primary{display:flex;align-items:center;gap:0.4rem;font-size:0.9rem}.nav-item{display:flex}.nav-link{display:inline-flex;align-items:center;padding:0.35rem 0.7rem;border-radius:999px;color:var(--color-text-muted);transition:background-color var(--transition-base),color var(--transition-base),transform var(--transition-fast)}.nav-link:hover,.nav-link:focus-visible{color:var(--color-neutral-900);background-color:rgba(148,163,184,0.12);transform:translateY(-0.5px)}.nav-link[aria-current="page"],.nav-link.is-active{color:var(--color-neutral-900);background-color:#e0f2fe}.nav-cta{display:flex;align-items:center;gap:0.5rem;flex-shrink:0}.nav-cta-label{white-space:nowrap;font-size:0.78rem}.nav-toggle{display:none;position:relative;justify-content:center;align-items:center;border-radius:999px;border:1px solid rgba(148,163,184,0.5);background-color:var(--color-surface-elevated)}.nav-toggle-bar{width:16px;height:2px;border-radius:999px;background-color:var(--color-neutral-800);transition:transform var(--transition-base),opacity var(--transition-base),translate var(--transition-base)}.nav-toggle-bar+.nav-toggle-bar{margin-top:3px}.nav-toggle.is-open .nav-toggle-bar:nth-child(1){transform:translateY(5px) rotate(45deg)}.nav-toggle.is-open .nav-toggle-bar:nth-child(2){opacity:0}.nav-toggle.is-open .nav-toggle-bar:nth-child(3){transform:translateY(-5px) rotate(-45deg)}.nav-toggle:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}@media (max-width:900px){.nav-wrapper{position:fixed;inset:var(--header-height) 0 auto 0;padding:0.75rem 1rem;background:rgba(249,250,251,0.98);backdrop-filter:blur(18px);border-bottom:1px solid rgba(148,163,184,0.2);transform:translateY(-100%);opacity:0;visibility:hidden;transition:transform var(--transition-base),opacity var(--transition-base),visibility var(--transition-base);z-index:30}.nav-wrapper.is-open{transform:translateY(0);opacity:1;visibility:visible}.nav-primary{flex-direction:column;align-items:flex-start;gap:0.15rem}.nav-link{width:100%;padding:0.6rem 0.8rem;font-size:0.95rem}.nav-cta{margin-left:auto}.nav-toggle{display:inline-flex;margin-left:auto}.site-header-inner{min-height:auto;padding-top:0.45rem;padding-bottom:0.45rem}}@media (max-width:640px){.nav-cta-label{display:none}.nav-cta .btn{padding-inline:0.7rem}.brand-sub{display:none}}