.site-header{position:sticky;top:0;z-index:40;background:rgba(247,251,255,0.9);backdrop-filter:blur(14px);border-bottom:1px solid rgba(148,163,184,0.18)}.header-inner{height:var(--header-height);display:flex;align-items:center;justify-content:space-between;gap:var(--space-6)}.logo{display:flex;align-items:center;gap:0.55rem;font-family:var(--font-display);font-weight:600;font-size:var(--font-size-lg);color:var(--color-primary-dark)}.logo-mark{width:32px;height:32px;border-radius:16px;background:radial-gradient(circle at 10% 0,#eff6ff 0,#bfdbfe 40%,#60a5fa 100%);box-shadow:0 10px 30px rgba(37,99,235,0.45);position:relative;overflow:hidden}.logo-mark::after{content:"";position:absolute;inset:auto 4px 6px 4px;border-radius:999px;background:radial-gradient(circle at 50% 0,rgba(255,255,255,0.9),transparent 70%)}.logo-text{letter-spacing:0.03em}.primary-nav{display:flex;align-items:center}.nav-list{display:flex;align-items:center;gap:var(--space-6)}.nav-item{}.nav-link{position:relative;padding:0.35rem 0;font-size:var(--font-size-sm);color:var(--gray-600);transition:color var(--transition-base)}.nav-link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;border-radius:999px;background:linear-gradient(90deg,#60a5fa,#2563eb);transition:width var(--transition-base)}.nav-link:hover,.nav-link:focus-visible{color:var(--color-primary-dark)}.nav-link:hover::after,.nav-link:focus-visible::after{width:100%}.nav-link.is-active{color:var(--color-primary-dark)}.nav-link.is-active::after{width:100%}.header-cta-wrapper{display:flex;align-items:center}.header-cta{font-size:var(--font-size-xs)}.nav-toggle{display:none;flex-direction:column;justify-content:center;align-items:center;width:40px;height:40px;border-radius:999px;border:1px solid rgba(148,163,184,0.6);background:rgba(255,255,255,0.9);box-shadow:var(--shadow-xs);gap:4px;padding:0;cursor:pointer}.nav-toggle-bar{width:18px;height:2px;border-radius:999px;background:var(--gray-700);transition:transform var(--transition-fast),opacity var(--transition-fast),width var(--transition-fast)}.nav-toggle.is-open .nav-toggle-bar:nth-child(1){transform:translateY(4px) rotate(45deg);width:16px}.nav-toggle.is-open .nav-toggle-bar:nth-child(2){opacity:0}.nav-toggle.is-open .nav-toggle-bar:nth-child(3){transform:translateY(-4px) rotate(-45deg);width:16px}.nav-menu-mobile{position:fixed;inset:var(--header-height) 0 auto 0;background:rgba(247,251,255,0.98);backdrop-filter:blur(16px);box-shadow:0 18px 40px rgba(15,23,42,0.16);transform:translateY(-4px);opacity:0;pointer-events:none;transition:opacity var(--transition-base),transform var(--transition-base);z-index:35}.nav-menu-mobile.is-open{opacity:1;transform:translateY(0);pointer-events:auto}.nav-menu-mobile-inner{display:flex;flex-direction:column;gap:var(--space-4);padding-top:var(--space-4);padding-bottom:var(--space-6)}.nav-menu-mobile-title{font-size:var(--font-size-sm);font-weight:600;color:var(--gray-700);text-transform:uppercase;letter-spacing:0.12em}.nav-menu-mobile-list{display:flex;flex-direction:column;margin-top:var(--space-2)}.nav-menu-mobile-link{display:block;padding:0.75rem 0;border-bottom:1px solid rgba(226,232,240,0.85);font-size:var(--font-size-base);color:var(--gray-700)}.nav-menu-mobile-link:last-child{border-bottom:none}.nav-menu-mobile-link:focus-visible{outline:none;box-shadow:0 0 0 3px var(--focus-ring-color);border-radius:6px;padding-left:0.5rem;padding-right:0.5rem}.nav-cta-mobile{margin-top:var(--space-4);display:flex;flex-wrap:wrap;gap:var(--space-3)}.nav-cta-mobile-btn{width:100%;justify-content:center}@media (max-width:900px){.primary-nav{display:none}.header-cta-wrapper{display:none}.nav-toggle{display:flex}}@media (max-width:768px){.header-inner{gap:var(--space-3)}}