*, *:after, *:before {
	box-sizing: border-box;
}

:root {
	font-size: 14px;
}

details div {
	border-left: 1px solid #bdbdbd;
	border-right: 1px solid #bdbdbd;
	border-bottom: 1px solid #bdbdbd;
	padding: 10px;
}

details div > * + * {
	margin-top: 1.5em;
}

details + details {
	margin-top: .5rem;
}

summary {
	list-style: none;
}

summary::-webkit-details-marker {
	display: none;
}

summary {
	border: 1px solid #bdbdbd;
	background-color: #eee;
	padding: .75em 1em;
	cursor: pointer;
	position: relative;
	padding-left: calc(1.75rem + .75rem + .75rem);
}

summary:before {
	position: absolute;
	top: 50%;
	transform: translateY(-50%);
	left: .75rem;
	content: "▼";
	width: 1.75rem;
	height: 1.75rem;
	background-color: transparent;
	color: #000000;
	display: inline-flex;
	justify-content: center;
	align-items: center;
	flex-shrink: 0;
}

details[open] summary {
	background-color: #d8d8d8;
}

details[open] summary:before {
	content: "▲";
}

summary:hover {
	background-color: #d8d8d8;
}

code {
	font-family: Arial, Helvetica, sans-serif;
	font-weight: 400;
}