body {
    margin: 20px;
    color: black;
    background-color: white;
}

pre {
    margin-left: 3em;
    color: #00008b;
}

.al { text-align: left; }
.ac { text-align: center; }
.ar { text-align: right; }


table td {
    padding: .2em;
    color: black;
    background-color: #af9;
}

table th {
    padding: .2em;
    color: white;
    background-color: #6b5;
}