.container {
    max-width: 800px;
    text-align: center;
    display: grid;
    border: 2px solid black;
    margin: 80px auto 80px;
    font-family: monospace;
}


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

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

main {
    grid-row: 3 / 4;
    grid-column:  1 / 2;
    
}

footer {
    grid-row: 4 / 5;
    grid-column:  1 / 2;
    
}