aside{
    flex:1;
    display:flex;
    right: auto;
}
.grid-container{
    margin:20px;

    margin-left:40px;
    margin-right: 40px;
    display:grid;
    grid-template-areas:
    'header header right'
    'main main right'
    'footer footer footer';
    background-color: #2196F3;
}
.grid-container > div{

    text-align: center;
    font-size: 20px;
    background-color: rgba(255, 255, 255, 0.8);
}