body {
  font-family: arial;
  margin: 0;
  padding: 0;
  overflow: hidden;
  height: 100%;
}

#bodyContainer {
  position: fixed;
  inset: 0;
  overflow: auto;
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 0;
}

#gameContainer {
  flex-grow: 1;
  min-height: 100px;
  min-width: 100px;
}

#gameCanvas {
  display: block;
  
  user-select: none;
  /* one can prevent most interactions with touchscreen using:
  touch-action: none;
  this includes the very annoying zoom-out with double tap, 
  but does not however cover the longpress that selects text...
  https://stackoverflow.com/questions/10614481/disable-double-tap-zoom-option-in-browser-on-touch-devices
  */
}