.CodeMirror-minimap {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, .1);
}

.CodeMirror-minimap:hover .CodeMirror-minimap__slider {
  background: rgba(0, 0, 0, .3);
}

.CodeMirror-minimap__slider {
  width: 100%;
  height: 0px;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 10;
  background: rgba(0, 0, 0, .1);
  transform: translateY(0px);
  transition: transform .1s, background-color .2s;
}