* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: #0d0d1a;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  touch-action: none;   /* the game handles drag and pinch itself; no page pan or zoom */
}

#gameCanvas,
#scene3d {
  display: block;
  position: absolute;
}

/* 3D game area sits under the 2D canvas, which draws the sidebar and overlays */
#scene3d {
  background: radial-gradient(120% 90% at 50% 30%, #243449 0%, #141c2e 55%, #0b0f1b 100%);
}

#gameCanvas {
  z-index: 1;
}