body {
  background-image: radial-gradient(circle, red, black);
  background-color: none;
  color: black;
}

a:link {
    color: white;
    }
a:visited {
    color: whiite;
    }

.center {
  margin-left: auto;
  margin-right: auto;
}
.container {
	width: 100%;
	height: 500px;
	border: 1px solid;
	padding: 0;
}

.box {
	width: 100%;
	height: 200px;
	color: white;
	background-color: none;
	text-align: center;
	font-size: 2em;
	border: none;
	border-radius: none;
	margin: none;
	padding: none;
}

.spalte {
	width: 33.1%;
	height: 100%;
	background-color: whitesmoke;
	border: 0px solid red;
	margin: 0px;
	padding: 0px;
	display: inline-block;
}

.box1 {
	width: 25%;
	height: 450px;
	color: white;
	background-color: whitesmoke;
	text-align: center;
	font-size: 2em;
	border: none;
	border-radius: none;
	margin: none;
	padding: none;
}