p.citation{
    margin-left: auto;
    margin-right: auto;
    width: 25em;
    text-align:justify
}
div.container {
    height: 25em;
    display: flex;
    align-items: center;
    justify-content: center
}
div.footer {
    height: 3em;
    display: flex;
    align-items: center;
    justify-content: center
}