#gameCanvas {
    border: 1px solid black;
}
#gameOverScreen {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    text-align: center;
    padding: 20px;
}
#gameOverScreen h1 {
    font-size: 24px;
    margin-bottom: 10px;
}
#gameOverScreen p {
    font-size: 18px;
    margin-bottom: 20px;
}
#gameOverScreen button {
    font-size: 18px;
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
}