WordPress/wp-includes/blocks/rss/style.min.css

ul.wp-block-rss{list-style:none;padding:0}ul.wp-block-rss.wp-block-rss{box-sizing:border-box}ul.wp-block-rss.alignleft{margin-right:2em}ul.wp-block-rss.alignright{margin-left:2em}ul.wp-block-rss.is-grid{display:flex;flex-wrap:wrap;list-style:none;padding:0}ul.wp-block-rss.is-grid li{margin:0 1em 1em 0;width:100%}@media (min-width:600px){ul.wp-block-rss.columns-2 li{width:calc(50% - 1em)}ul.wp-block-rss.columns-3 li{width:calc(33.33333% - 1em)}ul.wp-block-rss.columns-4 li{width:calc(25% - 1em)}ul.wp-block-rss.columns-5 li{width:calc(20% - 1em)}ul.wp-block-rss.columns-6 li{width:calc(16.66667% - 1em)}}.wp-block-rss__item-author,.wp-block-rss__item-publish-date{display:block;font-size:.8125em}