.w-100 {
  width: 100%;
}

.h-100{
  height: 100%;
}

html, body{
  width: 100%;
  height: 100vh;
  overflow: hidden;
  padding: 0px;
  margin: 0px;
}

canvas {
  padding: 0;
  margin: 0 auto 0 auto;
  display: block;
  width: 960px;
  height: 960px;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}