div#itemwrapper {
  overflow: hidden;
  background-color: rgba(0, 0, 0, 0.4);
  z-index: 999;
}

div#i_items {
  width: 300%;
  height: 100%;
  overflow: hidden;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: 1fr;
  grid-template-areas: ". . .";
}
div.i_item {
  overflow: hidden;
  height: 100%;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.item {
  max-height: 100%;
  max-width: 100%;
}
.item:hover {
  background-color: rgba(0, 0, 0, 0.8);
}