nav#page-nav > button {
	display:block; position:fixed;
	left:0;
	top:50%;
	width:50px;
	height:50px;
	margin:-34px 0 0 0; /*.5 height*/
	text-align:center;
	outline:0;
	background:url(../images/arrows-slider.svg) no-repeat;
	opacity:.4;
	will-change:transform;
}