WordPress/wp-includes/blocks/text-columns/style.min.css

.wp-block-text-columns,.wp-block-text-columns.aligncenter{display:flex}.wp-block-text-columns .wp-block-column{margin:0 1em;padding:0}.wp-block-text-columns .wp-block-column:first-child{margin-left:0}.wp-block-text-columns .wp-block-column:last-child{margin-right:0}.wp-block-text-columns.columns-2 .wp-block-column{width:50%}.wp-block-text-columns.columns-3 .wp-block-column{width:33.33333%}.wp-block-text-columns.columns-4 .wp-block-column{width:25%}