@font-face {
  font-family: "HBIOS-SYS";
  src: url("HBIOS-SYS.woff2") format("woff2");
  font-display: block;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: #000;
  overflow: hidden;
  overscroll-behavior: none;
  /* iOS long-press otherwise raises the selection loupe over the canvas. */
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}

canvas {
  display: block;
  /* Stops the browser stealing drags for scrolling and pinch-zoom. */
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}