/* Bilingual content switching (see lang-toggle.js). */
html[data-content-lang="zh"] .lang-en {
  display: none !important;
}
html[data-content-lang="en"] .lang-zh {
  display: none !important;
}

button.lang-toggle-btn {
  font-weight: 600;
  min-width: 2.5rem;
}

/* Fallback position when the theme header is not found. */
button.lang-toggle-floating {
  position: fixed;
  top: 0.5rem;
  right: 0.5rem;
  z-index: 1050;
  background: var(--pst-color-background, #fff);
  color: var(--pst-color-text-base, #333);
  border: 1px solid var(--pst-color-border, #ccc);
  border-radius: 0.25rem;
  padding: 0.2rem 0.6rem;
  cursor: pointer;
}