#template-editor-app .card-deck {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    grid-gap: .5rem;
}

#template-editor-app .card-deck .card{
    max-width: 480px;
}

#template-editor-app .card-img-top {
    min-height: 247px; 
    background-repeat: no-repeat; 
    background-size:contain; 
    background-position: top;
}