JezK
Edit File: editor-rtl.min.css
.wp-block[data-align=center]>.wp-block-button{margin-left:auto;margin-right:auto;text-align:center}.wp-block[data-align=right]>.wp-block-button{text-align:right}.wp-block-button{cursor:text;position:relative}.wp-block-button:focus{box-shadow:0 0 0 1px #fff,0 0 0 3px var(--wp-admin-theme-color);outline:2px solid transparent;outline-offset:-2px}.wp-block-button[data-rich-text-placeholder]:after{opacity:.8}div[data-type="core/button"]{display:table}