/* ─── Navigation Key Tips ───
 * Experimental PoC: visual key tips on main navigation links.
 * Activated by a short Alt press; dismissed by Escape, Alt, pointer, or selection.
 * Uses ::after pseudo-elements — no extra DOM nodes.
 */

/* Default: invisible, non-interactive */
[data-keytip] {
  position: relative;
}

[data-keytip]::after {
  content: attr(data-keytip);
  position: absolute;
  inset-block-start: 50%;
  inset-inline-end: 8px;
  transform: translateY(-50%);
  display: grid;
  place-items: center;
  min-inline-size: 1.4em;
  min-block-size: 1.4em;
  padding: 0 0.3em;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
  line-height: 1;
  font-family: var(--docs-font-sans);
  letter-spacing: 0;
  text-align: center;
  color: var(--docs-surface-1);
  background: var(--docs-accent);
  border: 1px solid var(--docs-accent);
  box-shadow: var(--docs-shadow-sm);
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 120ms ease, visibility 0ms 120ms;
  z-index: 1;
}

/* Active state — controlled via html[data-keytip-mode="active"] */
html[data-keytip-mode="active"] [data-keytip]::after {
  opacity: 1;
  visibility: visible;
  transition: opacity 120ms ease, visibility 0ms 0ms;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  [data-keytip]::after {
    transition: none;
  }
  html[data-keytip-mode="active"] [data-keytip]::after {
    transition: none;
  }
}