.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,0.9);backdrop-filter:blur(16px);border-bottom:1px solid var(--color-border-subtle)}.site-header__inner{display:flex;align-items:center;justify-content:space-between;padding-top:var(--space-3);padding-bottom:var(--space-3);gap:var(--space-4)}.site-header__brand{display:flex;align-items:center;min-width:0}.site-header__logo-link{display:inline-flex;align-items:center;gap:var(--space-3);color:var(--color-text)}.site-header__logo-mark{width:2.25rem;height:2.25rem;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--color-primary-soft),var(--color-success));color:#ffffff;font-family:var(--font-serif);font-size:1.25rem;letter-spacing:0.06em;box-shadow:var(--shadow-sm)}.site-header__identity{display:flex;flex-direction:column}.site-header__name{font-family:var(--font-serif);font-size:1.1rem;letter-spacing:0.08em;text-transform:uppercase}.site-header__tagline{font-size:var(--font-size-xs);color:var(--gray-500)}.site-header__nav{margin-left:auto}.site-header__nav-list{display:flex;align-items:center;gap:var(--space-3)}.site-header__nav-link{position:relative;font-size:var(--font-size-sm);color:var(--gray-700);padding:0.4rem 0.2rem}.site-header__nav-link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;border-radius:var(--radius-full);background:linear-gradient(90deg,var(--color-primary),var(--color-success));transition:width var(--transition-base)}.site-header__nav-link:hover::after,.site-header__nav-link:focus-visible::after{width:100%}.site-header__nav-link--cta{padding:0.4rem 0.9rem;border-radius:var(--radius-full);border:1px solid rgba(138,176,214,0.6);background:rgba(138,176,214,0.12);color:var(--color-primary-strong);box-shadow:var(--shadow-xs)}.site-header__nav-link--cta::after{display:none}.site-header__nav-link--cta:hover,.site-header__nav-link--cta:focus-visible{background:var(--color-primary);color:#ffffff;border-color:var(--color-primary-strong);box-shadow:var(--shadow-sm)}.site-header__toggle{display:inline-flex;flex-direction:column;justify-content:center;align-items:center;width:2.5rem;height:2.5rem;border-radius:var(--radius-full);border:1px solid rgba(148,163,184,0.4);background:rgba(255,255,255,0.9);gap:0.3rem;padding:0}.site-header__toggle-bar{width:1.25rem;height:2px;border-radius:999px;background-color:var(--gray-700);transition:transform var(--transition-base),opacity var(--transition-base)}.site-header__toggle:focus-visible{outline:2px solid var(--color-primary-strong);outline-offset:3px}.site-header__toggle[aria-expanded=true] .site-header__toggle-bar:first-child{transform:translateY(4px) rotate(45deg)}.site-header__toggle[aria-expanded=true] .site-header__toggle-bar:last-child{transform:translateY(-4px) rotate(-45deg)}@media (min-width:768px){.site-header__toggle{display:none}.site-header__nav-list{gap:var(--space-4)}.site-header__name{font-size:1.15rem}}@media (max-width:767.98px){.site-header__nav{position:absolute;left:0;right:0;top:100%;background:rgba(255,255,255,0.98);border-bottom:1px solid var(--color-border-subtle);transform-origin:top center;transform:scaleY(0.98);opacity:0;pointer-events:none;transition:opacity var(--transition-base),transform var(--transition-base)}.site-header__nav-list{flex-direction:column;align-items:flex-start;padding:var(--space-3) var(--layout-gutter) var(--space-4);gap:var(--space-2)}.site-header__nav-link{width:100%;padding:0.55rem 0}.site-header__nav-link--cta{width:auto;margin-top:var(--space-1)}.site-header__nav--open{opacity:1;transform:scaleY(1);pointer-events:auto}.site-header__inner{padding-top:var(--space-2);padding-bottom:var(--space-2)}}