.homepage .main-content .sub-content .logo-references .reference-item.qualiopi .tooltip {
  display: block;
  padding: 12px 16px;
  font-size: .9em;
  width: 230px;
  text-align: center;
  /* display: none; */
  position: absolute;
  bottom: calc(100% - 6px);
  left: -20px;
  border-radius: 3px;
  background-color: #00158e; /* bleu Qualiopi */
  color: white;
  opacity: 0;
  pointer-events: none;
  box-shadow: 0 0 50px 0 rgba(0,0,0,0.15);
  transition: opacity .150s;

  /* style 2 */
  /* font-weight: 600;
  background: white;
  color: #00158e; */

  /* style 3 */
  font-weight: 600;
  background: rgba(65,65,65,0.9);
  color: white;
}
.homepage .main-content .sub-content .logo-references .reference-item.qualiopi a:hover + .tooltip {
  /* display: block; */
  opacity: 1;
}