/header {
color: black;
 background-color: purple;
 }
 
header h1, h2 {
text-align: center;
font-family: sans-serif
}

table, th, td {
border: 1px solid black;
}

nav {
color: white;
background-color: purple;
grid-column: 1/3;
grid-row: 1/2;
max-width: 100px;
}     

nav a {
color: yellow;
background-color: purple;
margin: 3px;                                                                 
border: 1px solid gray;
border-bottom-width: 4px;
border-right-width: 4px;                         
padding: 3px 20px;
font-family: sans-serif;
font-size: 10px;
line-height: 2;
display: block
}

nav a:hover { 
    color: yellow;
    background-color: red;
}

table, th, td  {
    border : 1px solid back;
}

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

footer {
    grid-column: 1 / 2;
    grid-row: 3 / 4;
    color: white;
    background-color: black;
    font-family: sans-serif;
    font-size: x-small;
    padding: 2px 15px;
}



   * CSS Document */