.container {
  display: grid;
  grid-template-columns: auto auto auto;
  background-color: dodgerblue;
  padding: 10px;
  position: relative;
margin: 80px;
width: 600px;
  height: 600px;
}
.container div {
  background-color: #f1f1f1;
  border: 1px solid black;
  padding: 10px;
  font-size: 30px;
  text-align: center;
}

Highlights img:hover + #MoreInfoPopup {
  display: flex;}