body {
	padding: 5%;
	display: flex;
	justify-content: center;
}

.device {
	border: 1px solid #ccc;
	padding: 5%;
	margin: 5%;
	display: flex;
	flex-direction: column;
	align-items: center;
}

.sub_devices {
	display: flex;
	border: 1px solid #ccc;
}

.sub_device {
	border: 1px solid #ccc;
	padding: 1em;
	margin: 1em;
}