File: core/assets/plugins/ckeditor/plugins/widget/dev/assets/simplebox/contents.css

.simplebox {
	padding: 8px;
	margin: 10px;
	background: #eee;
	border-radius: 8px;
	border: 1px solid #ddd;
	box-shadow: 0 1px 1px #fff inset, 0 -1px 0px #ccc inset;
}
.simplebox-title, .simplebox-content {
	box-shadow: 0 1px 1px #ddd inset;
	border: 1px solid #cccccc;
	border-radius: 5px;
	background: #fff;
}
.simplebox-title {
	margin: 0 0 8px;
	padding: 5px 8px;
}
.simplebox-content {
	padding: 0 8px;
}
.simplebox-content::after {
	content: '';
	display: block;
	clear: both;
}
.simplebox.align-right {
	float: right;
}
.simplebox.align-left {
	float: left;
}
.simplebox.align-center {
	margin-left: auto;
	margin-right: auto;
}