/* classic editor sets the width to be 580px - and text is indented. */
body#tinymce.wp-editor.content {
	font-size: 16px;
	width: auto; 
}

body#tinymce.wp-editor.content p,
body#tinymce.wp-editor.content ul,
body#tinymce.wp-editor.content ol,
body#tinymce.wp-editor.content blockquote {
	line-height: 1.2;
}