.site-guide {
    display:grid;
    grid-template-columns: 1fr 1fr 1fr;
}
.site-guide > div {
    display:flex;
    align-items:center;
    flex-direction: column;
    border: solid 1px black;
    border-radius: 5px;
    margin:1px;
    padding-top:1ex;
    backgound: #ddd;
}
.large-container{
    grid-row-start: span 2;
}