:root {
    font-family: Arial, Helvetica, sans-serif;
}

#video {
    width: 0px;
    height: 0px;
}

#canvas {
    margin: 10px auto;
    display: block;
    background-size: cover;
    background-position: center;
}

.controls-box {
    box-shadow: 0 0 10px 0 #444;
    width: 200px;
    margin: 0 auto;
    padding: 5px;
}

.show-color {
    box-shadow: 0 0 3px 0 #ccc;
    width: 24px;
    height: 24px;
}

.red {
    background-color: #F00;
}

.green {
    background-color: #0F0;
}

.blue {
    background-color: #00F;
}