html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  height: 100dvh;                /* so the foot of the sheet is not hidden
                                    behind a mobile browser's toolbars */
  overflow: hidden;
  background: #efe6d2;
  overscroll-behavior: none;
}

body {
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

/* The sheet is an <img> rather than a <canvas> so that a long press offers
   the browser's own Save Image, which is what puts it in the camera roll. */
#sheet {
  position: fixed;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  height: 100dvh;
  object-fit: cover;
  -webkit-touch-callout: default;
}

/* The footnote lives on the page, not in the picture, so it is never baked
   into a saved wallpaper. */
#hint {
  position: fixed;
  right: 0;
  bottom: 0;
  display: block;
  pointer-events: none;
}