body{margin:0;display:flex;justify-content:center;align-items:center;min-height:100vh;background-color:#f7f7f7;font-family:Arial,sans-serif}.App{text-align:center}.game-container{position:relative;border:1px solid #ccc;background-color:#fff;overflow:hidden}.score-board{position:absolute;top:10px;right:10px;font-size:20px;font-weight:700}.game-over-overlay{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;background-color:#00000080;color:#fff}.game-over-overlay button{padding:10px 20px;font-size:16px;cursor:pointer;background-color:#fff;border:none;border-radius:4px;margin-top:10px}