#container{
	display: block;

	width: : 100%;
	height: 100%;
}

#main{
	display: block;
	width: 600px;
	height: 600px;
	margin-left: calc(50% - 300px);
	background-color: ;
	color: gray;

}

.item{
	display: block;
	width: 100%;

	text-align: center;
	background-color: ;
	font-size: 30px;

}

a:visited{
	color: gray;
}
a:hover{
	color: YellowGreen;
}