.slide_item{
	position:absolute;
	left:0;
	top:0;
	transition-property:opacity,transform;
	transition-duration:0.8s;
}
.slide_item:nth-child(1){
	position:relative;
}

#modalContents{
	display:block;
	opacity:0;
	transition-property:opacity;
	transition-duration:600ms;
	pointer-events:none;
}
#modalContents.on{
	opacity:1;
	pointer-events:all;
}