* {
    font-family: Arial, Helvetica, sans-serif;
}
body {
    padding: 0;
    margin: 0;
}

/* Page header */
.banner {
    display: flex;
    flex-direction: column-reverse;
}
.banner img {
    max-width: 100%;
}
.banner .qr {
    margin: 0 auto;
}
.banner > a {
    margin-top: 2em;
    text-align: center;
}

/* Page footer */
footer {
    background-color: black;
    color: aliceblue;
    padding: 12px 12px;
    margin-top: 12px;
    font-size: 0.8em;
    text-align: right;
}
footer p {
    margin: 0;
}

article,
.banner {
    margin: 0 12px;
}
/* Album */
article hgroup {
    display: flex;
    flex-direction: column;
}
article h1 {
    margin-bottom: 0;
}
article .description {
    margin-top: 0
}

article ul {
    list-style :none;
    margin: 0 auto;
    padding: 0;
    gap: 10px;
    display: flex;
    flex-wrap: wrap;
    align-content: stretch;
}
article ul li {
    display: inline-block;
    height: 90px;
    flex-grow: 1;
}
article ul li img {
    max-height: 100%;
    min-width: 100%;
    object-fit:cover;
    vertical-align: bottom;
}
  
article ul:after {
    content: "";
    display: block;
    flex-grow: 100;
}

@media (min-width: 710px) {
    .banner {
        flex-direction: row;
        align-content: center;
        justify-content: space-between;
    }
    .banner > a {
        width: 100%;
        margin: 0 5ex 0 1ex;
        align-self: flex-end;
        text-align: left;
    }
    .banner > a img {
        max-width: 800px;
        width: 100%;
    }
    .banner .qr {
        width: 200px;
        flex-grow: 0;
        margin: 0;
    }
    article header {
        align-items: baseline;
        flex-direction: row;
    }
    article header p {
        padding-left: 2ex;
    }
    /* Bigger thumbnail in wide mode */
    section ul li {
        height: 120px;
    }
}

/** LIGHTBOX MARKUP // https://codesalad.dev/blog/pop-up-image-lightbox-in-pure-css-25#_ **/
.lightbox {
    /* Default to hidden */
    display: none;
  
    /* Overlay entire screen */
    position: fixed;
    z-index: 999;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    
    /* A bit of padding around image */
    padding: 1em;
  
    /* Translucent background */
    background: rgba(0, 0, 0, 0.9);
}
  
  /* Unhide the lightbox when it's the target */
.lightbox:target {
    display: block;
}
  
.lightbox span {
    /* Full width and height */
    display: block;
    width: 100%;
    height: 100%;
  
    /* Size and position background image */
    background-position: center;
    background-repeat: no-repeat;
    background-size: contain;
}