dialog {
	position: absolute;
	left: 0; right: 0;
	width: -moz-fit-content;
	width: -webkit-fit-content;
	width: fit-content;
	height: -moz-fit-content;
	height: -webkit-fit-content;
	height: fit-content;
	margin: auto;
	border: solid;
	padding: 1em;
	background: white;
	color: black;
	display: block;
}

dialog:not([open]) {
	display: none;
}

dialog + .backdrop {
	position: fixed;
	top: 0; right: 0; bottom: 0; left: 0;
	background: rgba(0,0,0,0.1);
}

._dialog_overlay {
	position: fixed;
	top: 0; right: 0; bottom: 0; left: 0;
}

dialog.fixed {
	position: fixed;
	top: 50%;
	transform: translate(0, -50%);
}