/* sphinx-togglebutton collapses a closed dropdown's content to zero height, but padding and
   borders (blockquotes, figures) still take space and show as a blank band under the title.
   Remove them while the dropdown is closed. */
.admonition.toggle-hidden .admonition-title ~ * {
    padding: 0 !important;
    border: 0 !important;
    overflow: hidden;
}