@media screen and (orientation: portrait){


	body {
		background-color: lightblue;
	}

	#content_1 {
		display: block;
	}

	#content_2 {
		display: none;
	}
}

@media screen and (orientation: landscape) {
	
	body {
		background-color: lightgreen;
	}

	#content_1 {
		display: none;
	}

	#content_2 {
		display: block;
	}

}