/* Smartphone game shell only. No DOM/CSS UI components are used for gameplay UI;
   every button / icon / frame is drawn on the canvas as an image asset. */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;            /* no scrolling, per design rules */
  background: #1a3010;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: none;          /* tap-only, prevent browser gesture interference */
  overscroll-behavior: none;
}

#game {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}