canvas {
  /*padding-left: 0;
  padding-right: 0;
  margin-left: auto;
  margin-right: auto;
  display: block;*/

  margin-left: auto;
  margin-right: auto;
  margin-top: auto;
  margin-bottom: auto;

  position: absolute;

  top: 0px;
  right: 0px;
  left: 0px;
  bottom: 0px;
}

html {
  background: url("http://res.cloudinary.com/dlvkhiu0c/image/upload/v1459072511/001desktop_uu3sux.jpg") no-repeat center center fixed;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}