.ol-popup {
  position: absolute;
  background-color: #6B0F8E;
  color: #fff;
  filter: drop-shadow(0 1px 4px rgba(0,0,0,0.3));
  padding: 8px 14px;
  border-radius: 6px;
  border: 1px solid #FFD700;
  bottom: 12px;
  left: -50px;
  min-width: 0;
  width: auto;
  white-space: nowrap;
  font-size: 13px;
}
.ol-popup:after, .ol-popup:before {
  top: 100%;
  border: solid transparent;
  content: " ";
  height: 0;
  width: 0;
  position: absolute;
  pointer-events: none;
}
.ol-popup:after {
  border-top-color: #6B0F8E;
  border-width: 10px;
  left: 48px;
  margin-left: -10px;
}
.ol-popup:before {
  border-top-color: #FFD700;
  border-width: 11px;
  left: 48px;
  margin-left: -11px;
}