.cards {
    display: flex;
    flex-wrap: wrap;
}

.element-card {
    width: 20em;
    margin: 16px;
}

.element-card>.mdc-card__media {
    height: 9em;
}

#demo-absolute-fab {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    z-index: 1;
}