.speaker {
padding:1em;
margin-left: 1em;
}

.speaker p{
padding-left:1em;
}
.listitem_old{
overflow:auto;
margin:2em;
}

.listitem{
 display:grid;
  grid-template-columns: minmax(auto,1fr) 2fr;
}

.speaker_grid{
 display:grid;
  grid-template-columns: 1fr 1fr 1fr;
}

.speaker_griditem{
padding:10px;
}

.list_img{
margin:1em;
}

.list_img img{
display:block;
padding: 1em;margin-left: auto; margin-right: auto;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
}

@media (max-width: 1200px) {
.listitem{
  display:grid;
justify-content: center;
  grid-template-columns: 1fr;
}
.list_img img{
  max-width: 50%;
  max-height: 50%;
}}
@media (max-width: 1500px) {
.speaker_grid{
 display:grid;
  grid-template-columns: 1fr 1fr;
}
}