body {
    font-size: 120%;
}
h1 {
    font-size: 1em;
}
article {
    display: none;
    margin: 6px;
}
.reference {
    text-align: right;
}

ul.readings {
    display: block;
    clear: right;
    padding-left: 0;
}

ul.readings li {
    display: block;
    list-style: none;
    list-style-position: inside;
    width: 50%;
}

ul.readings li:nth-child(even) {
    float: left;
}

ul.readings li:nth-child(odd) {
    float: right;
    text-align: right;
}

footer.acknowledgment {
    display: block;
    padding-top: 2ex;
}

ul.navigation {
    float:right;
    display: block;
    clear: right;
    padding: 0;
    margin: 0;
}

ul.navigation li {
    font-size: 80%;
    font-weight: bolder;
    background-color: grey;
    color: white;
    display: inline;
    cursor: pointer;
    list-style: none;
    list-style-position: inside;
}

ul.navigation li:before {
    content: '[';
}

ul.navigation li:after {
    content: ']';
}