.header	{
		background: black; 
	}
// Navbar erstellen, grauer Hintergrund
 
.nav 		{
			background-color: grey;
			overflow: hidden;
		}
.nav a		{
			float: left;
            background-color: grey;
			color: white;
			text-align: center;
			text-decoration: none;
			padding: 14px 16px;
			font-size: 16px;
		}
.nav a:hover 	{	
			background-color:#ddd;
			color: black;	
		}
.grid-container {	
    display: grid; 
    grid-template-columns:auto auto auto;
    background-color: black;
    padding: 10 px;
    }
.grid-item  {
        background-color:grey;
        border: 1 px solid;
        padding: 16 px;
        font-size: 16 px;
        text-align:center;
        margin-left:auto;
        margin-right:auto;
    }
.center	{
		margin-left:auto;
		margin-right:auto;
	}

body	{
		background-color: black; 
		color: white;
		text-align: center;
		font-size: 20px;
     	}

img 	{
	  	width: 30%;
	  	height: auto;
	  	display : block; 
        margin-left:auto;
	  	margin-right: auto;
	 }
spn