Hi there,
you can try this CSS:
.wp-show-posts-inner>div:not(.wp-show-posts-image),
.wp-show-posts-entry-header {
padding-left: 1em;
padding-right: 1em;
}
.wp-show-posts-columns .wp-show-posts-inner {
box-shadow: 0 0 10px 5px #ccc;
padding-bottom: 1em;
}
