.wp-block-image {
    max-width: 100%;
    margin-bottom: 1em;
    margin-left: 0;
    margin-right: 0;
}

figcaption, figure {
    display: block;
}

.wp-block-image figcaption, .wp-block-table figcaption {
    margin-top: .5em;
    margin-bottom: 1em;
    color: #555d66;
    text-align: center;
    font-size: 13px;
}

img[class*="wp-image-"] {
    height: auto;
}
.entry-content img, .comment-content img, .widget img {
    max-width: 100%;
}
.wp-block-image img {
    max-width: 100%;
}

.wp-block-image .alignright  { float: right;
                               margin-left: 1em; }

.wp-block-image .alignleft  { float: left; 
                              margin-right: 1em; }

figure.aligncenter  { text-align: center; }