libreCMC/package/luci/applications/luci-app-adblock/luasrc/view/adblock/config_css.htm

<style type="text/css">
	textarea
	{
		border: 1px solid #cccccc;
		padding: 5px;
		font-size: 12px;
		font-family: monospace;
		resize: none;
	}
</style>