.mumble{
	/*background-image: url(../images/mumble/mumble-bg.png);*/
	position: relative;
	padding-bottom: 20px;
}

.mumble:before {
    display: block;
    background-image: url(../images/mumble/mumble-bg.png);
    opacity: 0.8;
    content: ' ';
    background-repeat: no-repeat;
    background-position: 50% 0;
    background-size: cover;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    position: absolute;
}