body {
	background-color: aquamarine;
	margin: 0;
}


main {
	max-width: 800px;
	margin: auto;
	display: flex;
	flex-wrap: wrap;
}

textarea {
	padding: 0;
	border: 1px solid lightgray;
	width: 100%;
	height: 50vh;
	field-sizing: content;
	font-size: 16px;
}

iframe {
	border: 1px solid lightgray;
	width: 100%;
	height: 50vh;
	background-color: white;
}