Use your site's CSS in the block editor

When editing a block, the content is styled using a generic stylesheet and does not reflect the css styles you have created for your site. However, this can easily be changed by editing the stylesheet that comes with CKEditor.

Just navigate to pulsepro/plugins/ckeditor/contents.css and copy in the styles from your main stylesheet. Now when you go to edit a block or blog post, it will match the frontend design of your site.