body {
    font-size: larger;
    text-align: center;
    background: darkblue;
    color: yellow;
}

.main {
    width: 8.5in;
    margin: auto;
    text-align: left;
    color: #304;
    background: #edf;
}
.source {
    font-family: "Courier New", monospace;
    font-weight: 500;
    font-size: 1.2rem;
    line-height: 1.05;
    color: #131;
    background: #EFE;
}

.red {
    color: red;
}

.angry {
    color: red;
    background: #FDD;
}

.critical {
    color: darkred;
}

.tabbedList {
    list-style-type: none;
}

.oddDemo li:nth-child(odd) {
    color:darkblue;
    list-style-type: square;
}

table, td, th {
    border: 1px solid;
    border-collapse: collapse;
}

tr:nth-child(2n) {
    background-color: lightblue;
}
td:nth-child(3n), th:nth-child(3n) {
    background: lightgreen;
}

/*
  Navigation buttons that look and act like buttons,

*/
a.nav_btn, a.arrow_btn {
    display: inline-block;
    text-align: center;
    font-size: 15pt;
    text-decoration: none;
    font-weight: bold;
    color: #CAD;
    padding: 1em;
    margin: 5pt;
    background-color: #250030;
    border: 3pt outset #101;
    border-radius: 1em;
    box-shadow: 3px 3px 5px rgba(0,0,0,.80);
}

a:hover.nav_btn  {
    background-color: #400030;
    color: #ECF;
}

a:active.nav_btn  {
    background-color: #800070;
    color: #FDF;
    border: 3pt inset #101;
}