.popup {
  display: none; /* Caché par défaut */
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5); /* Fond semi-transparent */
  justify-content: center;
  align-items: center;
  z-index:97;
}

#openPopup, #openPopup2{background: aquamarine;color: #444;border:0;padding:8px 10px;text-transform: uppercase;font-size: .8em;font-weight: bold;cursor:pointer;}

.popup-content {
  background: white;
  padding: 20px;
  border-radius: 10px;
  min-width: 300px;
  text-align: center;
  box-shadow: 0 0 10px black;
}

.close {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 30px;
  cursor: pointer;
}

.list-popup-cours li{list-style-type: none;}