If I change the top margin in the html for each entry I can reduce the spacing between them but I can’t figure out how to do it automatically using css.
So here, I’d change 288px to, say, 266px, but the next entry has a different number of pixels, and so on for each.
<article id="post-834" class="post-834 post type-post status-publish format-standard hentry category-uncategorized column onecol has-thumbnail masonry-brick" style="position: absolute; top: 288px; left: 0px;">