body{
    display: grid;
    max-width: 1024px;
    grid-template-columns:auto 200px;
    grid-template-rows: 150px auto 15px;
    margin: 0 auto;
    }

header,footer{
    font-family:calibri, Arial, sans-serif;
    color:white;
    background: black;
    }

header {
    grid-column: 1/3;
    grid-row: 1/2;
    }

nav {
    grid-column: 2/3;
    grid-row : 2/ span 2;
    }

section {
    grid-column: 1/2;
    grid-row: 2/3;
    }
    
footer {
    grid-column: 1/2;
    grid-row: 3/4;
    font-size: x-small
    }
    
nav a {
    font-family:calibri, Arial, sans-serif;
    font-size: large;
    font-weight: bold ;
    text-decoration: none;
    color: white;
    background: black;
    display: block;
    margin: 1px;
    padding: 5px 0px 5px 15px;
    border: 5px outset grey;
    }
    
table,th,td {
    border: 1px solid black;
    font-family: sans-serif;
    }
table {
    border-collapse: collapse;
    }   
th,tr:nth-child(odd) {
    background-color: #D3D3D3;
    }

td {
    text-align: center;
    width: 8%;
    }