body {
    /*background-color: black;*/
    font-family: monospace;
}
.container{
    display: flex;
    justify-content: center;
    align-items: center;
}
.container canvas {
    position: absolute;
    margin: auto;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    width: 600px;
    height: 600px;
    /*background-color: #ccc;*/
    /*border-radius: 3px;*/
}
#fftWatch {
    padding: 5px;
    min-width: 95px;
    height: 30px;
    line-height: 30px;
    text-align: right;
    text-shadow: rgb(34, 34, 34) 1px 1px 0px;
    background: rgb(34, 34, 34);
    color: rgb(255, 255, 255);
    border: 1px solid rgb(26, 26, 26);
    position: absolute;
    z-index: 10;
    left: 5px;
    top: 49px;
    right: auto;
    bottom: auto;
    margin: 0px;
    cursor: pointer;
}
#fftSize {
    position: absolute;
    top: 0px;
    right: 0px;
    padding: 5px 10px;
    height: 30px;
    font-size: 24px;
    font-family: Consolas, "Andale Mono", monospace;
    z-index: 2;
}
#fftLabel {
    position: absolute;
    top: 0px;
    left: 0px;
    padding: 5px 10px;
    height: 30px;
    font-size: 12px;
    line-height: 32px;
    font-family: sans-serif;
    text-align: left;
    z-index: 2;
}