/* Acessibilidade básica: foco visível, skip link, alto contraste e redução de movimento */

/* Skip link — aparece ao receber foco */
.skip-link {
  position: fixed;
  left: 1rem;
  top: -100px;
  z-index: 10000;
  padding: .5rem .75rem;
  background: #0d6efd;
  color: #fff;
  border-radius: .375rem;
  box-shadow: 0 2px 8px rgba(0,0,0,.2);
  text-decoration: none;
}
.skip-link:focus { top: 1rem; }

/* Foco visível global */
:where(a, button, [role="button"], input, select, textarea, summary):focus-visible {
  outline: 3px solid #0d6efd;
  outline-offset: 3px;
}

/* Preferência por alto contraste (navegadores com forced-colors) */
@media (forced-colors: active) {
  :where(a, button, [role="button"], input, select, textarea, summary):focus-visible {
    outline: 3px solid CanvasText;
  }
  .skip-link { background: CanvasText; color: Canvas; }
}

/* Reduzir movimento para usuários com essa preferência */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* Utilitário de ocultação acessível */
.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }