/* neu-boxes-1spaltig.css */
@media (max-width:959px){
#container {
    padding: 1em
}
.custom {
    width: 100 % ;
    display: grid;
    grid: "kopf" "links" "mitte" "rechts" "fuss";
    grid-template-columns: minmax(240px, 1fr);
    grid-gap: 1em
}
}