body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #000033;
    font-family: Arial, sans-serif;
    color: white;
}

#gameContainer {
    position: relative;
    width: 800px;
    height: 600px;
}

#gameCanvas {
    border: 2px solid white;
    background-color: #000020;
}

#uiOverlay {
    position: absolute;
    top: 10px;
    left: 10px;
    font-size: 18px;
}

#uiOverlay > div {
    margin-bottom: 5px;
}

#gameOver, #startScreen {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    background-color: rgba(0, 0, 0, 0.8);
    padding: 20px;
    border-radius: 10px;
    display: none;
}

button {
    font-size: 18px;
    padding: 10px 20px;
    margin-top: 20px;
    cursor: pointer;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
}

button:hover {
    background-color: #45a049;
}

#instructions {
    margin-top: 20px;
    font-size: 14px;
}