#back {
	background-color: white;
	position: fixed;
	top: 20px;
	left: 35px;
	opacity: 0.3;
	text-decoration: none;
	height: 20px;
	display: none;
	border-radius: 0px 5px 5px 0px;
	color: #555555;
	font: 15px/15px "HelveticaNeue-Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
	letter-spacing: 0;
	padding: 10px 15px 8px 10px;
}

.touch #back {
	opacity: 1;
}

#back:hover {
	opacity: 1;
}

#back:after{ 
content:"";
display:block;
position:absolute;
top:0px;
left:-37px; 
width:0;
height:0;
border-color: transparent white transparent transparent; 
border-style: solid;
border-width: 19px;
}

#back.black {
	background-color: black;
	color: white;
}
#back.black:after {
	border-right-color: black;
}

@media (min-width: 700px) {

#back {
	display: block;
}

}