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

canvas {
    width: 100%;
    height: 100%;
}

.controls {
    position: absolute;
    top: 10px;
    left: 10px;
    background-color: rgba(0,0,0,0.5);
    color: white;
    padding: 10px;
    border-radius: 5px;
}

.controls div {
    margin-bottom: 5px;
}

.controls label {
    display: inline-block;
    width: 100px;
}