body {
    width: 1010px;
    height: 50px;
    color: red;
    
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
}

left {
    color: green;
}

main {
    color: blue;

    width: 100%;
    height: 50em;
}

right {
    color: yellow;
}