body {
    background-image: url('cardboard.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    background-attachment: fixed;
    margin: 0 20%;
    padding: 0;
    font-family: 'Comic Neue', cursive, sans-serif;
    align-items: center;
}

div {
    display: flex;
    flex-direction: column;
    align-items: center;
}