canvas {
    width: 100%;       /* Allow it to fill the container */
    height: auto;      /* Keep it proportional */
    display: block;
    margin: 0 auto;
}
html, body, .wrapper {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden; /* Prevents scrollbars */
}