html {
    height: 100%;
}

body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
    color: whitesmoke;
    background-color: black;
}