.nav {
  position: fixed;
  z-index: 2;
  left: 50%;
  top: var(--nav-top);
  translate: -50%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: var(--nav-gap);
  overflow: clip;
  border: var(--nav-border) solid var(--nav-edge);
  border-radius: var(--nav-outer);
  background: var(--nav-bg);
  -webkit-backdrop-filter: var(--effect-style-background-blur-overlay);
  backdrop-filter: var(--effect-style-background-blur-overlay);
}

.nav a {
  position: relative;
  z-index: 1;
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  height: var(--nav-h);
  padding-inline: var(--spacing-small);
  border-radius: var(--nav-inner);
  font: var(--text-subheadline-medium);
  letter-spacing: var(--text-subheadline-medium-tracking);
  color: var(--nav-ink);
  text-decoration: none;
  transition: color 160ms ease;
}

.nav-initial { display: none; }

.nav a[data-key="home"] {
  flex: 0 0 var(--nav-h);
  width: var(--nav-h);
  padding-inline: 0;
}

.nav a[data-on],
.nav a[aria-current] { color: var(--nav-ink-on); }

.nav-thumb {
  position: absolute;
  top: var(--nav-gap);
  height: var(--nav-h);
  border-radius: var(--nav-inner);
  border: var(--nav-thumb-border) solid var(--nav-thumb-edge);
  background: var(--nav-thumb);
  box-shadow: var(--nav-thumb-inset);
  pointer-events: none;
  opacity: 0;
  transition:
    left 320ms cubic-bezier(0.2, 0.8, 0.2, 1),
    right 320ms cubic-bezier(0.2, 0.8, 0.2, 1),
    opacity 200ms ease;
}

.nav-thumb.is-on { opacity: 1; }

.nav-thumb.is-instant { transition: none; }

.nav[data-cursor-in="true"] .nav-thumb { opacity: 0; transition: opacity 120ms ease; }

@media (max-width: 768px) {
  .nav {
    left: auto;
    right: var(--padding-edge);
    top: var(--spacing-xlarge);
    translate: none;
    margin-inline: 0;
  }
}

@media (max-width: 359px) {
  .nav a {
    flex: 0 0 var(--nav-h);
    width: var(--nav-h);
    padding-inline: 0;
  }

  .nav-label { display: none; }
  .nav-initial { display: inline; }
}

@media (prefers-reduced-motion: reduce) {
  .nav { transition: opacity 140ms linear; }
  .nav-thumb { transition-duration: 1ms, 1ms, 120ms; }
}