.nav{position:sticky;top:0;z-index:50;background:#ffffffd9;backdrop-filter:saturate(140%) blur(12px);-webkit-backdrop-filter:saturate(140%) blur(12px);border-bottom:1px solid var(--color-border)}.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:.875rem 1.5rem;max-width:var(--max-width);margin:0 auto}.brand{display:flex;align-items:center;gap:.5rem;font-weight:700;font-size:1.125rem;color:var(--color-heading)}.nav-links{display:flex;gap:1.75rem;list-style:none;margin:0;padding:0;font-size:.9375rem}.nav-links a{color:var(--color-text);font-weight:500}.nav-links a:hover{color:var(--color-accent)}.nav-links a.nav-track-switch{color:var(--color-accent);font-weight:600}.nav-links a.nav-track-switch:hover{color:var(--color-link-hover)}.nav-links a.is-active{color:var(--color-accent);text-decoration:underline;text-decoration-color:var(--color-accent);text-decoration-thickness:2px;text-underline-offset:6px}.nav-actions{display:flex;gap:.75rem;align-items:center}.lang-link{display:inline-flex;align-items:center;background:var(--color-surface);border:1px solid var(--color-border);border-radius:999px;padding:.25rem .75rem;font-size:.8125rem;font-weight:600;color:var(--color-text-muted)}.lang-link:hover{color:var(--color-heading);border-color:var(--color-heading)}