header{
	background-color: #00008B;
	color: white;
	padding: 20px;
	text-align: center;	
}
h1{
	font-weight: 400;
}
#first a {
	display: flex;
	width: 300px;
	height: 300px;
}
#second a {
	display: flex;
	width: 300px;
	height: 300px;
}