#electron-canvas {
  margin: auto;
  width: 50%;
  padding: 10px;
  background: transparent;
}

canvas {
    padding-left: 0;
    padding-right: 0;
    margin-left: auto;
    margin-right: auto;
    display: block;
    width: 800px;
}

.container_side_to_side {
  width:600px;
  height:190px;
  padding-top:20px;
  padding-left:15px;
  padding-right:15px;
}
#st-box {
  float:left;
  width:300px;
  height:190px;
}
#rd-box {
  float:right;
  width:300px;
  height:190px;
}