body.wp-admin section.block-columns{border:1px solid #ccc}body.wp-admin section .container .grid:empty:before{font-size:2rem;color:#e88b39;font-weight:600;content:"This is an empty *block* - add content";padding:2rem 0;display:block}body.wp-admin section .container .grid .col:empty:before{color:#e88b39;font-weight:600;content:"This is an empty *column* - add content";padding:2rem 0;display:block}.block-columns .col-icon{max-width:100px;margin:0 auto 2rem}