.site-header{position:sticky;top:0;z-index:40;backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);background:linear-gradient(to bottom,rgba(15,23,42,0.9),rgba(15,23,42,0.5));border-bottom:1px solid rgba(233,213,255,0.25)}.site-header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--nav-height)}.brand{display:flex;align-items:center;gap:var(--space-3);color:var(--color-text);text-decoration:none}.brand-mark{width:34px;height:34px;border-radius:999px;background:radial-gradient(circle at 30% 20%,#e0f2fe,#6366f1 40%,#a855f7 75%);box-shadow:0 0 0 1px rgba(255,255,255,0.45),0 0 26px rgba(129,140,248,0.9)}.brand-text{display:flex;flex-direction:column;gap:2px}.brand-name{font-family:var(--font-heading);font-size:var(--text-lg);font-weight:600;letter-spacing:-0.02em}.brand-tagline{font-size:var(--text-xs);color:var(--color-text-soft)}.nav{display:flex;align-items:center;gap:var(--space-6);font-size:var(--text-sm)}.nav-list{display:flex;align-items:center;gap:var(--space-6)}.nav-link{position:relative;color:var(--color-text-soft);padding-block:0.25rem;transition:color var(--transition-base)}.nav-link::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;border-radius:999px;background:var(--color-primary);transition:width var(--transition-base)}.nav-link:hover,.nav-link:focus-visible{color:var(--color-text)}.nav-link:hover::after,.nav-link:focus-visible::after{width:100%}.nav-cta{margin-left:var(--space-4)}.nav-toggle{display:none;align-items:center;justify-content:center;width:40px;height:40px;border-radius:999px;border:1px solid rgba(233,213,255,0.45);background:rgba(15,23,42,0.85);flex-direction:column;gap:6px;transition:background var(--transition-base),border-color var(--transition-base),transform var(--transition-fast)}.nav-toggle span{width:18px;height:2px;border-radius:999px;background:var(--color-text);transition:transform var(--transition-base),opacity var(--transition-base),width var(--transition-base)}.nav-toggle:focus-visible{outline:2px solid var(--color-primary);outline-offset:3px}.nav-toggle.is-active{background:rgba(15,23,42,0.95);border-color:var(--color-primary)}.nav-toggle.is-active span:nth-child(1){transform:translateY(4px) rotate(45deg);width:20px}.nav-toggle.is-active span:nth-child(2){transform:translateY(-4px) rotate(-45deg);width:20px}@media (max-width:960px){.nav-toggle{display:inline-flex}.nav{position:fixed;inset-inline:var(--space-4);top:calc(var(--nav-height) + var(--space-3));background:rgba(15,23,42,0.96);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-radius:var(--radius-lg);border:1px solid rgba(233,213,255,0.35);flex-direction:column;align-items:flex-start;padding:var(--space-4);gap:var(--space-4);max-width:420px;margin-inline:auto;transform:translateY(-12px);opacity:0;pointer-events:none;transition:opacity var(--transition-base),transform var(--transition-base)}.nav.nav-open{opacity:1;pointer-events:auto;transform:translateY(0)}.nav-list{flex-direction:column;align-items:flex-start;gap:var(--space-3)}.nav-cta{margin-left:0;width:100%}.nav-cta .btn{width:100%;justify-content:center}}@media (max-width:600px){.brand-tagline{display:none}}