app-poule {
  margin: 10px;
  grid-row: 1;
  min-width: 470px;
  box-shadow: 0 3px 1px -2px rgba(0,0,0,.2), 0 2px 2px 0 rgba(0,0,0,.14), 0 1px 5px 0 rgba(0,0,0,.12);
}

#poulecontainer {
  display: grid;
}