.popover .arrow, .popover .arrow:after {
  position: absolute;
  display: block;
  width: 0;
  height: 0;
  border-color: transparent;
  border-style: solid;
}

.popover .arrow {
  border-width: 11px;
}

.popover .arrow:after {
  border-width: 10px;
  content: "";
}

.popover.top .arrow {
  left: 50%;
  margin-left: -11px;
  border-bottom-width: 0;
  border-top-color: #999999;
  border-top-color: fadein(rgba(0, 0, 0, 0.2), 5%);
  bottom: -11px;
}
.popover.top .arrow:after {
  content: " ";
  bottom: 1px;
  margin-left: -10px;
  border-bottom-width: 0;
  border-top-color: white;
}
.popover.right .arrow {
  top: 50%;
  left: -11px;
  margin-top: -11px;
  border-left-width: 0;
  border-right-color: #999999;
  border-right-color: fadein(rgba(0, 0, 0, 0.2), 5%);
}
.popover.right .arrow:after {
  content: " ";
  left: 1px;
  bottom: -10px;
  border-left-width: 0;
  border-right-color: white;
}
.popover.bottom .arrow {
  left: 50%;
  margin-left: -11px;
  border-top-width: 0;
  border-bottom-color: #999999;
  border-bottom-color: fadein(rgba(0, 0, 0, 0.2), 5%);
  top: -11px;
}
.popover.bottom .arrow:after {
  content: " ";
  top: 1px;
  margin-left: -10px;
  border-top-width: 0;
  border-bottom-color: white;
}
.popover.left .arrow {
  top: 50%;
  right: -11px;
  margin-top: -11px;
  border-right-width: 0;
  border-left-color: #999999;
  border-left-color: fadein(rgba(0, 0, 0, 0.2), 5%);
}
.popover.left .arrow:after {
  content: " ";
  right: 1px;
  border-right-width: 0;
  border-left-color: white;
  bottom: -10px;
}