html, body {
  margin: 0;
  padding: 0;
}
/* GENERAL SUPERGROK 2026-10-04: centre the 400px board without the old 50%/translate trick, and let it
   shrink on phones. p5.js maps mouse/touch through the canvas's on-screen size, so the paddle still
   follows the finger when the board is scaled down. */
canvas {
  display: block;
  margin: 6vh auto 0;
  max-width: 100%;
  height: auto !important;
}