/* ============================================================
   Acessibilidade: foco visivel, skip link, texto so-leitor.
   ============================================================ */

/* Anel de foco forte e consistente em TODO elemento focavel. */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: var(--foco);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Conteudo visivel apenas para leitores de tela. */
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Link "pular para o conteudo": escondido ate receber foco. */
.skip-link {
  position: absolute;
  left: var(--sp-3);
  top: -60px;
  z-index: 1000;
  background: var(--accent);
  color: #1a1200;
  font-weight: 700;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: top .15s ease;
}
.skip-link:focus {
  top: var(--sp-3);
  color: #1a1200;
}

/* O conteudo principal recebe foco via skip link sem anel duro. */
#conteudo-principal:focus { outline: none; }