header {
    text-align: center;
    border-radius: 12px;
    background-color: rgb(115, 160, 197);
    background-image: url("blue_gradient.jpg");
    background-repeat: repeat-x;
    margin: 0px;
    padding: 0.4em;
}

header>h1 {
    color: white;
    margin: 0px;
}

header>div.description,
header>div.datestamp {
    color: white;
    padding: 0;
}

header>div.datestamp {
    margin-top: 1em;
}

header>div.datestamp>a {
    color: inherit;
}

.toc_list>h3 {
    margin-top: 0.75rem;
    margin-bottom: 0em;
}

.toc_list>h3>a[href^="http"]::before,
.toc_list a[href="https://blog.stoa.org/archives/786"]::before {
    content: "";
    background-image: url(../icons/external_link.svg);
    background-size: 100% 100%;
    display: inline-block;
    width: 0.8em;
    height: 0.8em;
    margin-right: 0.2em;
}

.toc_list ul {
    padding-left: 1.5em;
}

.toc_list ul>li {
    margin-top: 1em;
}

footer>h2 {
    margin-top: 0;
}

@media only screen and (min-width: 768px) {
    header {
        margin: 1em;
        padding: 2em 1em;
    }
    .toc_list>h3 {
        margin-top: 2rem;
        margin-bottom: 1rem;
    }
    .toc_list>p,
    .toc_list ul,
    footer ul {
        margin: 0px;
        margin-left: 2rem;
    }
    .toc_list ul,
    footer ul {
        padding-left: 1em;
    }
    .toc_list>hr {
        margin-top: 2rem;
    }
}