html, body {
  background-color: rgb(0,0,0);
  margin: 0;
  padding: 0;
  overflow:hidden;
}
/* 
main {
  position: absolute;
  top:0px;
  left:0px;
  height: 100%;
}
*/

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