#page-header {
    
}

#page-footer {
    /* ref: https://developer.mozilla.org/en-US/docs/Web/CSS/Layout_cookbook/Center_an_element */
    /* does not look well with small screen size */
    /* display: flex;
    align-items: center;
    justify-content: center;*/
    display: grid;
    place-items: center;

    /* border */
    /* named color ref: https://developer.mozilla.org/en-US/docs/Web/CSS/named-color*/
    border-top: 1px solid lightgrey;
}

/*
blockquote {
    background-color: lightgrey;
}
*/