.roi-popover {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  display: none;
  max-width: 276px;
  padding: 1px;
  text-align: left;
  text-transform: none;
  white-space: normal;
  background-color: #fff;
  border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: 6px;
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
  background-clip: padding-box;
}
.roi-popover .roi-arrow {
  position: absolute;
  display: block;
  width: 0;
  height: 0;
  border: 11px solid transparent;
}
.roi-popover.roi-top {
  margin-top: -10px;
}
.roi-popover.roi-top .roi-arrow {
  bottom: -11px;
  left: 50%;
  margin-left: -11px;
  border-top-color: #999;
  border-top-color: rgba(0, 0, 0, 0.25);
  border-bottom-width: 0;
}
.roi-popover-content {
  padding: 9px 14px;
}