#setdisplay {
  overflow: hidden;
  max-height: 725px; /* altura máxima estimada do conteúdo */
  opacity: 1;
  visibility: visible;
  transition: max-height 0.5s ease, opacity 0.5s ease;
}

#setdisplay.hidden {
  max-height: 0;
  opacity: 0;
  visibility: hidden;
  padding: 0;
  margin: 0;
}

#itemsdisplay {
  overflow: hidden;
  max-height: 725px; /* altura máxima estimada do conteúdo */
  opacity: 1;
  visibility: visible;
  transition: max-height 0.5s ease, opacity 0.5s ease;
}

#itemsdisplay.hidden {
  max-height: 0;
  opacity: 0;
  visibility: hidden;
  padding: 0;
  margin: 0;
}