.wp-block-columns {
    display: flex;
}

.wp-block-image figure.aligncenter img,
.wp-block-image figure.aligncenter video,
.wp-block-image figure.aligncenter iframe {
    display: block;
    margin-left: auto;
    margin-right: auto;
}

@media only screen and (max-width:440px) {
    .wp-block-image figure.alignright img,
    .wp-block-image figure.alignright video,
    .wp-block-image figure.alignright iframe,
    .wp-block-image figure.alignleft img,
    .wp-block-image figure.alignleft video,
    .wp-block-image figure.alignleft iframe {
        display: block;
        float: none;
        margin-left: auto;
        margin-right: auto;
    }
    .wp-block-image figure.alignright,
    .wp-block-image figure.alignleft {
        float: none;
    }
    .wp-block-image figure {
        margin: auto;
    }
    #content img {
        max-width: 100%;
        height: auto;
    }
    #content iframe {
        max-width: 100%;
    }
}