body[contenteditable] blockquote {
    border: 1px solid coral;
    padding: 10px;
}

body[contenteditable] blockquote span {
    display: block;
    border: 1px solid green;
    margin: 5px 10px;
    padding: 5px;
}


body[contenteditable] blockquote b {
    display: block;
    border: 1px solid blue;
    margin: 5px 10px;
    padding: 5px;
}
/*


 */