h1,h2,h3,h4 { padding: 0; margin: 0; }
    
body {
    font-family: Arial, Helvetica, sans-serif;
    padding: 1em 4em 1em 4em;
}

#header {
    color: black;
    text-align: center;
    padding: 1em;
}

h1 {
    font-size: 26pt;
    font-weight: bolder;
}

h2 { 
    margin-top: 1.5em;
    border-bottom: 1px solid black;
    font-style: italic;
    font-size: 130%;
    font-weight: bolder;
}

h3 {
    font-size: 110%;
    font-weight: bolder;
    font-style: italic;
    padding-top: 12px;
}

dt {
    font-weight: bold;
    margin-left: 1em;
}

dd {
    margin-bottom: 1em;
    margin-left: 2em;
    margin-top: 0.5em;
}

#propagation {
    padding: 8px 0 8px 0;
}