body,html{margin:0;padding:0;width:100%;height:100%;overflow:hidden;background-color:#000;-webkit-user-select:none;user-select:none}#game-canvas{position:absolute;top:0;left:0;width:100%;height:100%;z-index:1;background:linear-gradient(to bottom,#024b82,#00122b)}#ui-layer{position:absolute;top:0;left:0;width:100%;height:100%;z-index:10;pointer-events:none}.score-board{position:absolute;top:20px;left:20px;color:gold;font-size:24px;font-family:Arial,sans-serif;font-weight:700;text-shadow:2px 2px 4px rgba(0,0,0,.8);pointer-events:auto}#orientation-prompt{display:none;position:absolute;top:0;left:0;width:100%;height:100%;background-color:#000;z-index:9999;color:#fff;justify-content:center;align-items:center;text-align:center;font-family:sans-serif;font-size:24px;line-height:1.5}@media screen and (orientation:portrait)and (pointer:coarse){#orientation-prompt{display:flex}#game-canvas,#ui-layer{display:none}}