.topbar{position:sticky;top:0;z-index:20;backdrop-filter:blur(24px) saturate(180%);background:rgba(245,245,247,.78);border-bottom:1px solid rgba(0,0,0,.08)}.topbar-inner{max-width:1180px;margin:auto;height:54px;display:flex;align-items:center;justify-content:space-between;padding:0 24px}.brand{font-weight:720;letter-spacing:-.02em}.nav{display:flex;gap:20px;font-size:13px;color:var(--muted)}.nav a{text-decoration:none}.nav a:hover{color:var(--ink)}