html,
body {
    height: 100%;
}

/* stick footer to bottom */
body > footer {
    position: sticky;
    top: 100vh;
    padding: 2rem 0 1rem 0;
}

/* show anchor */
a.flatmark-anchor {
    text-decoration: none;
    font-size: 0.8em;
    display: none;
}

h1:hover>a.flatmark-anchor,
h2:hover>a.flatmark-anchor,
h3:hover>a.flatmark-anchor,
h4:hover>a.flatmark-anchor,
h5:hover>a.flatmark-anchor,
h6:hover>a.flatmark-anchor {
    display: inline;
}