custom.css

/* Make the sidebar scrollable. Fixes https://github.com/psf/black/issues/990 */
div.sphinxsidebar {
  max-height: calc(100% - 18px);
  overflow-y: auto;
}

/* Hide scrollbar for Chrome, Safari and Opera */
div.sphinxsidebar::-webkit-scrollbar {
  display: none;
}

/* Hide scrollbar for IE 6, 7 and 8 */
@media \0screen\, screen\9 {
  div.sphinxsidebar {
    -ms-overflow-style: none;
  }
}

/* Hide scrollbar for IE 9 and 10 */
/* backslash-9 removes ie11+ & old Safari 4 */
@media screen and (min-width: 0\0) {
  div.sphinxsidebar {
    -ms-overflow-style: none\9;
  }
}

/* Hide scrollbar for IE 11 and up */
_:-ms-fullscreen,
:root div.sphinxsidebar {
  -ms-overflow-style: none;
}

/* Hide scrollbar for Edge */
@supports (-ms-ime-align: auto) {
  div.sphinxsidebar {
    -ms-overflow-style: none;
  }
}

/* Nicer style for local document toc */
.contents.topic {
  background: none;
  border: none;
}