styles/chartcss/_sonification.scss

#sonic {
	width:20px;
	height:20px;
	text-align: center;
	background-color:#b3b2b2;
	color: white;
	font-size:11px;
	border-radius:50%;
	margin-top:0px;
	display:inline-block;
	margin-right: 10px;
	background-image: url('https://interactive.guim.co.uk/embed/aus/graphics/sonification/audio.svg');
	background-size: 90%;
	background-position: center;
	z-index:99;
	cursor: pointer;
	border-color: none;
	border-style: none;
	border:none;
	cursor: pointer;
}

// button {
// 	border-color: none;
// 	border-style: none;
// }