.popover {
  position: absolute;
  display: none;
  background: #fff;
  border: 1px solid #999;
  padding: 10px;
  width: auto;
  box-shadow: 0 0 10px rgba(0, 0, 0, .5);
}

.popover:after,
.popover:before {
  right: 100%;
  border: solid transparent;
  content: " ";
  height: 0;
  width: 0;
  position: absolute;
  pointer-events: none;
}

.popover:after {
  border-color: rgba(255, 255, 255, 0);
  border-right-color: #ffffff;
  border-width: 10px;
  top: 50%;
  margin-top: -10px;
}

.popover:before {
  border-color: rgba(201, 201, 201, 0);
  border-right-color: #c9c9c9;
  border-width: 11px;
  top: 50%;
  margin-top: -11px;
}

.popover.opposite:after,
.popover.opposite:before {
  right: auto;
  left: 100%;
}

.popover.opposite:after {
  border-color: rgba(255, 255, 255, 0);
  border-left-color: #ffffff;
}

.popover.opposite:before {
  border-color: rgba(201, 201, 201, 0);
  border-left-color: #c9c9c9;
}