/* ==========================================================
   Botón "Comprar libro" / "Buy the book" en el header
   Archivo propio (no lo genera Mobirise).
   ========================================================== */

section.menu .nav-item.buy-book > a.btn {
  margin: 0 0 0 .65rem !important;
  padding: .55rem 1.4rem !important;
  white-space: nowrap;
  font-size: 1rem;      /* igual que el resto del menú (display-4) */
  font-weight: 500;
  color: #ffffff !important;
}
section.menu .nav-item.buy-book > a.btn:focus {
  box-shadow: none;
  outline: none;
}

/* Móvil (menú hamburguesa): el botón ocupa su propia línea */
@media (max-width: 991px) {
  section.menu .nav-item.buy-book {
    margin: .5rem 0;
  }
  section.menu .nav-item.buy-book > a.btn {
    margin: 0 .65rem !important;
    font-size: 1rem !important;
    font-weight: 500 !important;
    line-height: 1.5 !important;
    padding: .55rem 1.4rem !important;
  }
}