body {
    background-color:#88FFAA
}

.dug_section {
    margin: 1cm 5cm;
    padding: 5mm;
    border: 2px solid black;
    border-radius: 1cm;
    color: lightgray;
    background-color: #00000088;
}

hr {
    border: none;
    background-color: black;
    height: 2px;
    margin: 5mm -5mm;
}

.reference {
    padding-left: 1cm;
    text-indent: -1cm;
}