html, body {
    height: 100%;
    background-color: #dedede;
}

body > div.container {
    color: #1a1a1a;
    display: flex;
    flex-direction: column;
    align-items: center;
}

h3 {
    font-weight: 400;
    font-size: calc(1.3rem + .2vw);
}

figcaption {
    font-size: calc(0.8rem + .1vw);
}

footer {
    padding-top: 0.5em;
    padding-bottom: 0.5em;
    margin-top: 2em;
    background-color: #b9b9b9;
    border-top: 1px solid #898989;
}

footer > div.container-fluid {
    font-size: 0.9em;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
}

.muted {
    color: #7e7e7e;
}

@media (prefers-color-scheme: dark) {
    html, body {
        background-color: #2b2b2b;
    }

    body > div.container {
        color: #f3f3f3;
    }

    footer {
        border-color: #515151;
        background-color: #222;
        color: #c9c9c9;
    }

    .muted {
        color: #454545;
    }
}