WordPress/wp-includes/blocks/more/editor.min.css

.block-editor-block-list__block[data-type="core/more"]{margin-bottom:28px;margin-top:28px;max-width:100%;text-align:center}.wp-block-more{display:block;text-align:center;white-space:nowrap}.wp-block-more input[type=text]{background:#fff;border:none;border-radius:4px;box-shadow:none;color:#757575;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen-Sans,Ubuntu,Cantarell,Helvetica Neue,sans-serif;font-size:13px;font-weight:600;height:24px;margin:0;max-width:100%;padding:6px 8px;position:relative;text-align:center;text-transform:uppercase;white-space:nowrap}.wp-block-more input[type=text]:focus{box-shadow:none}.wp-block-more:before{border-top:3px dashed #ccc;content:"";left:0;position:absolute;right:0;top:50%}