html, body { margin: 0; height: 100%; background: #fff; }
body { display: grid; place-items: center; }

button {
  padding: 0; border: 0; background: none; cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
button:focus-visible { outline: 2px dashed #888; outline-offset: 4px; }

canvas {
  display: block;
  width: min(472px, 100vw);
  height: auto;
  /* Just enough that the clip's off-white background clips to pure white and blends into the page. */
  filter: brightness(1.04);
}