.post-body, .comments { max-width: 1000px; }
.post-head { max-width: 1100px; }

.entry-content img,
.entry-content figure,
.entry-content .wp-caption { margin-left: auto; margin-right: auto; }
.entry-content figcaption,
.entry-content .wp-caption-text { text-align: center; }