figure.knab-caption {
    --knab-caption-font-size: 13px;
}
figure.knab-caption > figcaption.wp-element-caption {
    font-size: var(--knab-caption-font-size);
    font-style: italic;
    text-align: center;
    line-height: 1.6;
    overflow-wrap: anywhere;
}