html, body {
    height: 100%;
    width: 100%;
    margin: 0;
}

#phasebeam {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

#phasebeam canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}