#wrapper{
    display:grid;
    grid-template-columns: minmax(0px, 1fr) repeat(5, minmax(0, 275px)) minmax(0px, 1fr);    
}
nav{
    background-color: #F90a0a;
    grid-column: 1 / -1;
    grid-row: 1 / 2;
}
main{
    background-color: #d9d9d9;
    grid-column: 1 / -1;
    grid-row: 2 / 3;
}
#content1{
    background-color: #6fffd2;
    grid-column: 2 / 7;
    grid-row: 3 / 4;
}
footer{
    background-color: #f90a0a;
    grid-column: 1 / -1;
    grid-row: 4 / 5;
}