#preview,
#videoBuffer,
#stickerBuffer {
	position: fixed;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	width: min(100vw, 177.78vh); /* 16:9のアスペクト比を維持 */
	height: min(56.25vw, 100vh); /* 16:9のアスペクト比を維持 */
}

.debug {
	display: none;
}