.gridContainer{
    display: grid;
    grid-template-areas: 
    "topNav topNav"
    "sideNav content"
    ;
    grid-column: 1fr 5fr ;
}

.gridContainer > div{
    gap: 3px;
}

.gridContainer > div.topNav {
    grid-area: topNav;
}

.gridContainer > div.sideNav {
    grid-area: sideNav;
}

.gridContainer > div.content {
    grid-area: content;
}