header > nav {
		/* hidden by default */
		display: none;
	}
	header > button {
		background-color: transparent;
		border: none;
		color: white;
		display: inline-block;
		font-size: 17px;
		padding: 12px 16px;
		text-align: center;
		text-decoration: none;
	
		position: absolute;
		right: 0;
		top: 0;
	}
@media only screen and (min-width: 770px) {
	header > nav {
		/* show by default */
		display: inline-block;
	}
	header > button {
		display: none;
	}
}