div.bezierContainer > canvas {
    display: block;
    margin: 1.5em auto;
    border-radius: 10px;
    box-shadow: #eaeaea 0 0 0px 3px;
    border: #fff 15px solid;
    width: 640px;
    height: 400px;
}

div.sliderContainer {
    display: block;
    margin: 2em auto 2.5em auto;
}