body {
    margin: 0;
    display: grid;
    max-height: 100vh;
    max-width: 100vw;
    min-height: 100vh;
    grid-template-columns: 1fr;
    grid-template-rows: auto 3fr auto;
    grid-template-areas: "header"
                        "main"
                        "footer";
    overflow-x: hidden;
}