body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

canvas {
  width: 95vmin;
  height: 95vmin;
}
/* The vmin unit in CSS is a relative length unit based on the viewport's minimum dimension. */

h1 {
  position: absolute;
  top: 140px;
  color: white;
  font-family: cursive;
  text-align: center;
  color: gray;
  width: 100%;
}