body {
    margin: 0;
    background: #000;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

canvas {
    background: #fff;
    box-shadow: 0 0 20px rgba(255,255,255,0.2);
    /* Crucial for mobile performance */
    touch-action: none;
    -webkit-touch-callout: none; /* Disables the long-press popup menu */
    user-select: none; /* Prevents text highlighting while tapping */
}