bvs/static/style.css

body {
    background-color: rgb(3, 26, 33); 
}

.canvas {
    position: absolute;
    overflow: visible;
    top: 0px;
    left: 0px;
    background-color: rgba(3, 26, 33, 0);
}

.container{
    height:20px;
    background-color: #CCC;
    position: relative
}