/* Adapted from: https://jsfiddle.net/a6tgy9so/1/ */

.drag-handle {
  position: absolute;
  width: 0;
  height: 0;
  top: 0;
  left: 0;
  margin-left: 5px;
  margin-top: 5px;
  border-right: 10px solid transparent;
  border-top: 10px solid black;
  cursor: move;
}

.dockable {
  /* Needed in Chrome for drag handles to be placed correctly. */
  position: relative;
}

.dock-overlay {
  opacity: 0.2;
  display: none;
  z-index: 1;
  position: absolute;
  width: 260px;
  height: 5000vh;
  top: 60px;
  bottom: 0;
}

#dock-overlay-left {
  left: 0;
  right: auto;
}

#dock-overlay-right {
  left: auto;
  right: 0;
}

.drag-active {
  outline: 3px dotted #666;
  box-sizing: border-box;
  background: lightgray;
}

.drag-over {
  background: yellow;
}