* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            overflow: hidden;
            background: linear-gradient(160deg, #90e0ef 0%, #0077b6 100%);
        }

        #stats {
            position: fixed;
            top: 20px;
            right: 20px;
            font-size: 24px;
            color: white;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
            text-align: right;
        }

        #preview {
            position: fixed;
            top: 20px;
            left: 20px;
            font-size: 24px;
            color: white;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
        }

        .game-over {
            display: none;
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: rgba(0, 0, 0, 0.8);
            padding: 20px;
            color: white;
            text-align: center;
            border-radius: 10px;
            z-index: 100;
        }

        .game-over button {
            padding: 10px 20px;
            margin-top: 20px;
            font-size: 16px;
            cursor: pointer;
        }