/* for block of numbers */
td.hljs-ln-numbers {
	-webkit-touch-callout: none;
	-webkit-user-select: none;
	-khtml-user-select: none;
	-moz-user-select: none;
	-ms-user-select: none;
	user-select: none;

	text-align: center;
	color: #ccc;
	border-right: 1px solid #CCC;
	vertical-align: top;
	padding-right: 5px;

	/* your custom style here */
}

/* for block of code */
td.hljs-ln-code {
	padding-left: 10px;
}