img {
  -webkit-user-select: none;
      -ms-user-select: none;
          user-select: none;
}

#cards {
  overflow-x: auto;
  flex-wrap: unset;
}
#cards .col {
  width: 18rem;
  max-width: 18rem;
  min-width: 18rem;
  overflow-y: auto;
}
#cards .col .card .card-header img {
  cursor: pointer;
}
#cards .col .card .list-group {
  max-height: 33.3vh;
  overflow: auto;
}
#cards .col .card .list-group .list-group-item {
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
}