body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #2c2c2c;
    font-family: Arial, sans-serif;
}

#gameCanvas {
    border: 2px solid #555;
    background-color: #1a1a1a;
    display: block;
}