@charset "utf-8";


#mainimg {
	position: relative;
	width: 100vw;
	height: 100vh;
	overflow: hidden;
	z-index: -1;
}

#mainimg video {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	object-fit: cover;
	object-position: center center;
	opacity: 0;
	transition: opacity 0.5s ease;	/*0.5sがフェードにかける時間*/
	will-change: opacity;
	z-index: 0;
}

#mainimg video.active {
	opacity: 1;
	z-index: 1;
}