<style>
	::marker,
	::-webkit-details-marker {
		display: none;
	}

	summary {
		list-style: none;
	}

	details summary:before {
		content: '→';
		display: inline-block;
		rotate: 0deg;
		margin-inline-end: 0.5em;
		transition: rotate 0.3s ease-in-out;
	}

	details[open] > summary:before {
		rotate: 90deg;
	}
</style>