/* ============================================================
   _sass/lang-toggle.scss  (ou cole no seu custom.css / main.css)
   Botão de troca de idioma — drb.github.io
   ============================================================ */

.lang-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;

  /* Posicionamento na masthead */
  position: relative;
  margin-left: 1rem;
  vertical-align: middle;

  /* Tipografia */
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1;
  color: #fff;

  /* Visual */
  background: transparent;
  border: 1.5px solid rgba(255, 255, 255, 0.55);
  border-radius: 4px;
  padding: 0.35em 0.75em;
  cursor: pointer;
  white-space: nowrap;

  /* Transição suave */
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}

.lang-toggle-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.9);
}

.lang-toggle-btn:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

/* Micro-animação ao clicar */
.lang-toggle-btn--active {
  transform: scale(0.93);
  background: rgba(255, 255, 255, 0.25);
}

/* ── Versão para masthead escuro (padrão do Academic Pages) ── */
.masthead .lang-toggle-btn {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
}

/* ── Responsivo: tela pequena ── */
@media (max-width: 768px) {
  .lang-toggle-btn {
    font-size: 0.75rem;
    padding: 0.3em 0.6em;
    margin-left: 0.5rem;
  }
}