pre {
	position: relative;
}

code.has-linenumbers {
	margin-left: 21px;
}

.numbering {
	position: absolute;
	top: 0;
	left: 0;
	margin: 0;
	padding: 6px 2px 6px 0;
	width: 20px;
	border: 1px solid #e1e1e1;
	border-radius: 4px 0 0 4px;
	background-color: #EEE;
	text-align: right;
}

.numbering li {
	margin: 0;
	padding: 0;
}

.numbering li:hover {
	outline: 1px solid red;
	background: #7efc7e;
}

.numbering li:before {
	content: "";
	width: 0;
	height: 0;
}