body {
    background-color: #000;
    margin: 0;
}

#container {
    position: absolute;
    margin: auto;
    width: 768px;
    height: 768px;
    border: 1px solid #222;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
}

.label {
    font-size: 1.5em;
    font-family: monospace;
    margin-left: 4px;
}

.math {
    color: #f0f;
}

.physics {
    color: #0ff;
}