:root{--primary:#08f;--danger:red;--success:#0f0;--bg-dark:#1a1a2e;--text:#fff}*{box-sizing:border-box;margin:0;padding:0}html,body{background-color:var(--bg-dark);width:100%;height:100%;color:var(--text);touch-action:none;overscroll-behavior:none;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;font-family:Arial,sans-serif;overflow:hidden}#app{width:100%;height:100%;position:relative}#app canvas{width:100%;height:100%;display:block}