.wp-block-areoi-card-group {
    width: 100%;
    border:  1px dashed #ccc;
    min-height: 28px;
}

/* Horizontal */
.card-group > .block-editor-inner-blocks {
    width: 100%;
}
.card-group > .block-editor-inner-blocks > .block-editor-block-list__layout {
    width: 100%;
    position: relative;
    flex: 1 1 auto;
    display: flex;
    flex-flow: row wrap;
}

.card-group > .block-editor-inner-blocks > .block-editor-block-list__layout > .card {
    flex: 1 0 0%;
    margin-bottom: 0;
}
.card-group > .block-editor-inner-blocks > .block-editor-block-list__layout > .card:not(:last-of-type) {
    border-top-right-radius: 0 !important;
    border-bottom-right-radius: 0 !important;
}

.card-group > .block-editor-inner-blocks > .block-editor-block-list__layout > .card:not(:first-of-type) {
    border-top-left-radius: 0 !important;
    border-bottom-left-radius: 0 !important;
    margin-left: -1px;
}