body {
    width: 100vw;
    height: 100vh;
    margin: 0;
    padding: 0;
    background-color: #ffffff;
    display: grid;
    align-content: center;
    justify-content: center;
    grid-template-columns: 1fr;
    grid-template-rows: 1fr;
}
div {
    align-self: center;
    justify-self: center;
}