Block_reference_embed.css

/* I added this - Code for changing the appearance of 
block reference embeds */

/* Adjust padding on the embed */
.markdown-embed .markdown-preview-view { /* the padding */
    padding: 0px 0px 0px 0px; /* up right down left */
}

/* Adjusting the link icon in the embed */
.markdown-embed-link, .file-embed-link {
    position: absolute;
    top: 0em;
    right: -1em;
    color: #ebe134;
    cursor: pointer;
}



/* Removing the top and bottom lines */
.markdown-preview-view .markdown-embed, .markdown-preview-view .file-embed {
    border-top: 0px;
    border-bottom: 0px;
    padding: 0px 0;
    margin: 0px 0;
}


/* Removing duplication of bullets when block referencing a list item
Parent inside a bullet list */
li .markdown-embed ul {
    position: relative;
    margin-left: 0px;
    padding-left: 0px; 
    cursor: alias;
}

/* Child inside a bullet list */
li .markdown-embed ul ul   {
    position: relative;
    margin-left: 0px;
    padding-left: 40px; 
}

/* Task list inside an embed */
li .markdown-embed li.task-list-item {
    position: relative;
    margin-left: 0px;
    padding-left: 0px;

}