body {
    color: #fefefe;
    background: #222;
    margin: 20px;
}

h2 {
    text-shadow: 3px 3px #111;
    margin-top: 40px;
}

.eqnarray {
    border-radius: 5px;
    box-shadow: 2px 5px 5px #000;
    padding: 10px;
    background: #333;
}