canvas {
            border: 4px solid #333;
            box-shadow: 0 0 20px rgba(0,0,0,0.7);
            background-color: #23272a;
            
            /* Tvinga pixel-art rendering via CSS */
            image-rendering: -moz-crisp-edges;
            image-rendering: -webkit-crisp-edges;
            image-rendering: pixelated;
            image-rendering: crisp-edges;
        }