body {
    margin:0;
    background-color: #0d0d0d;
    display:flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow:hidden;
    font-family: sans-serif;
}

#gameCanvas {
    background-color: #1a1226; /* Dark alien cave color */
    border: 4px solid #3d2954;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.7);
}