.container {
	position: relative;
	width: 100px;
	height: 100px;
	border: 1px solid #000;
	background: #fff;
	overflow: hidden;
}

.container .wave {
	position: absolute;
	left: 50%;
	top: 50%;
	width: 100%;
	height: 100%;
	border-radius: 50%;
	transform: translate(-50%, -50%) scale(0, 0);
	background: #eee;
	transition: all 0.9s ease;
}

.container:active .wave {
	transform: translate(-50%, -50%) scale(2, 2);
} /*# sourceMappingURL=button.css.map */