FRONTEND_MVC/components/admin/ckeditor/plugins/widget/dev/assets/contents.css

.mediumBorder {
	border-width: 2px;
}
.thickBorder {
	border-width: 5px;
}
img.thickBorder, img.mediumBorder {
	border-style: solid;
	border-color: #CCC;
}
.important.soMuch {
	margin: 25px;
	padding: 25px;
	background: red;
	border: none;
}

span.redMarker {
	background-color: red;
}
.invisible {
	opacity: 0.1;
}