@media screen {
	._bd_bkg-slider {
		position:relative;
		}
	._bd_bkg-slider > * {
		position:relative;
		z-index:+3;
		}
	._bd_slide-over {
		opacity:0;
		z-index:2;
		}
	._bd_slide-over,
	._bd_slide-under {
		position:absolute;
		top:0px;
		left:0px;
		right:0px;
		bottom:0px;
		
		background-position:center center;
		background-size:cover;
		background-repeat:no-repeat;
		}
	._bd_slide-under {
		opacity:1.0;
		z-index:1;
		}
}