body {
		font-family: arial;
	}
	a {
		text-decoration: none;
		color: green;
	}	
	header {
		text-align: center;
		background-color: LightGrey;
	}
	footer {
		background-color: LightGrey;
		text-align: center;
		padding-bottom: 0.5em;
	}
	#video {
		text-align: center;
	}
	#imagen {
		text-align: center;
	}
	#vector {
		text-align: center;
	}