.site-header{position:sticky;z-index:800;top:0;border-bottom:1px solid rgb(43 55 68 / .78);background:rgb(8 12 20 / .94);box-shadow:0 8px 24px rgb(0 0 0 / .12);backdrop-filter:blur(14px)}.site-header__inner{display:flex;min-height:4.5rem;align-items:center;gap:var(--space-4)}.site-header__brand{display:flex;min-width:0;align-items:center;gap:.625rem;color:var(--color-ivory-100);text-decoration:none}.site-header__logo{flex:0 0 auto;width:2rem;height:2rem;object-fit:contain}.site-header__brand-copy{display:grid;min-width:0;gap:.05rem}.site-header__brand-name{overflow:hidden;font-family:var(--font-serif);font-size:1rem;font-weight:600;line-height:1.05;text-overflow:ellipsis;white-space:nowrap}.site-header__brand-note{color:var(--color-sage-300);font-size:.625rem;font-weight:700;letter-spacing:.09em;line-height:1.2;text-transform:uppercase;white-space:nowrap}.site-header__toggle{display:grid;flex:0 0 auto;place-content:center;gap:.28rem;width:3rem;height:3rem;margin-left:auto;padding:0;border:1px solid var(--color-border);border-radius:var(--radius-control);background:transparent}.site-header__toggle span{display:block;width:1.2rem;height:1px;background:var(--color-ivory-100);transition:transform var(--transition-base),opacity var(--transition-base)}.site-header__toggle[aria-expanded="true"] span:first-child{transform:translateY(.38rem) rotate(45deg)}.site-header__toggle[aria-expanded="true"] span:nth-child(2){opacity:0}.site-header__toggle[aria-expanded="true"] span:last-child{transform:translateY(-.38rem) rotate(-45deg)}.site-header__nav{position:absolute;top:calc(100% + 1px);right:0;left:0;display:none;max-height:calc(100vh - 4.5rem);overflow:auto;padding:var(--space-6) var(--gutter) var(--space-8);border-bottom:1px solid var(--color-border);background:var(--color-ink-950);box-shadow:var(--shadow-elevated)}.site-header__nav.is-open{display:block}.site-header__nav-list,.site-header__mobile-extra{display:grid;gap:0;margin:0;padding:0;list-style:none}.site-header__nav-list li{margin:0;padding:0}.site-header__nav a{display:flex;min-height:3rem;align-items:center;border-bottom:1px solid rgb(43 55 68 / .65);color:var(--color-ivory-100);font-size:var(--text-nav);font-weight:650;line-height:1.2;text-decoration:none}.site-header__nav a:hover,.site-header__nav a[aria-current="page"]{color:var(--color-ivory-100);box-shadow:inset 0 -2px 0 var(--color-gold-400)}.site-header__download{width:100%;margin-top:var(--space-6)}.site-header__mobile-extra{margin-top:var(--space-4)}.site-header__mobile-extra a{color:var(--color-sage-300);font-size:.875rem;font-weight:500}.site-menu-open{overflow:hidden}@media (min-width:70rem){.site-header__inner{min-height:4.75rem;gap:var(--space-6)}.site-header__logo{width:2.5rem;height:2.5rem}.site-header__brand-name{font-size:1.2rem}.site-header__brand-note{font-size:.625rem}.site-header__toggle{display:none}.site-header__nav{position:static;display:flex;min-width:0;max-height:none;align-items:center;gap:var(--space-4);margin-left:auto;padding:0;border:0;background:transparent;box-shadow:none;overflow:visible}.site-header__nav-list{display:flex;min-width:0;align-items:center;gap:clamp(.65rem,1.15vw,1.1rem)}.site-header__nav-list li{display:flex;align-items:center}.site-header__nav a{min-height:2.75rem;white-space:nowrap;border:0;font-size:.8125rem}.site-header__nav a:hover,.site-header__nav a[aria-current="page"]{box-shadow:inset 0 -2px 0 var(--color-gold-400)}.site-header__download{flex:0 0 auto;width:auto;min-height:2.75rem;margin:0;padding:.65rem .9rem;font-size:.8125rem;white-space:nowrap}.site-header__mobile-extra{display:none}}@media (prefers-reduced-motion:reduce){.site-header__toggle span{transition:none}}