body {
    display: grid;
    grid-template-columns: auto 100px;
    grid-template-rows: 300px auto 25px ;
}
h1 {
    text-align: center;
    color: black;
    background-color: gray;
    font-family: 'Calibri', sans-serif;
    font-style: italic;
    font-size: xx-large;}
h2 {
    text-align: center;
    color: blue;
    font-family: 'Calibri', sans-serif;
    font-size: x-large;}
h3 {
    text-align: center;
    color: white;
    font-family: 'Calibri', sans-serif;
    font-size: large;}
h4 {
    text-align: center;
    color: black;
    font-family: 'Calibri', sans-serif;
    font-size: medium;}
h5 {
    text-align: center;
    color: black;
    font-family: 'Calibri', sans-serif;
    font-size: small;}   
h6 {
    text-align: center;
    color: black;
    font-family: 'Calibri', sans-serif;
    font-size: x-small;}
p {
    text-align: justify;
    font-size: xx-small;
    font-style: oblique;
    font-family: 'Times New Roman', Times, serif;}
header {
    grid-column: 1/3 ;
    grid-row: 1/3;
    border: 5px  black;
}
nav {
    grid-column: 2/2 ;
    grid-row: 2/4;
    background-color: gray;
    border: 5px black;
    margin : 10px;
}
section {
    grid-column: 1/2 ;
    grid-row: 2/3;
    border: 5px gray;
}
footer {
    grid-column: 1/2 ;
    grid-row: 3/4;
    background-color: blueviolet;
    border: 5px solid gray;/* CSS Document */