summary {
	position: relative;  
}

details::details-content {
	opacity: 0;
	transition:
		opacity 600ms,
		border-color 600ms,
		content-visibility 600ms allow-discrete;
}

details:open::details-content {
	opacity: 1;
}

details:open {
	border-color: transparent;
	background-color: oklch(0.9 0.1 90); 	
}