Frontend/static/styles/tooltipster/themes/tooltipster-shadow.css

.tooltipster-shadow {
  border-radius: 5px;
  background: #fff;
  box-shadow: 0px 0px 14px rgba(0,0,0,0.3);
  color: #2c2c2c;
}
.tooltipster-shadow .tooltipster-content {
  font-family: 'Arial', sans-serif;
  font-size: 14px;
  line-height: 16px;
  padding: 8px 10px;
}