body {
            margin: 0;
            overflow: hidden;
            background: #000;
            }
        #gameCanvas {
            background: url('1.gif') center/cover;
        }
        #gameUI {
            position: absolute;
            top: 20px;
            left: 20px;
            color: #FFF;
            font-size: 20px;
            text-shadow: 2px 2px 2px rgba(0, 0, 0, 0.5);
        }
        #restartBtn {
            display: none;
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            padding: 15px 30px;
            font-size: 24px;
            background: #4CAF50;
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
        }
        #rulesModal {
            display: none;
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: rgba(0, 0, 0, 0.9);
            color: white;
            padding: 30px;
            border-radius: 10px;
            text-align: center;
            z-index: 100;
        }
        #rulesModal button {
            margin: 10px;
            padding: 10px 20px;
            font-size: 18px;
            cursor: pointer;
        }