* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #000;
    color: white;
    font-family: Arial, sans-serif;
}

#game-container {
    position: relative;
}

#gameCanvas {
    background-color: black;
    display: block;
    border: 1px solid white;
}

#game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    display: none;
}

#play-again {
    padding: 10px 20px;
    margin-top: 20px;
    font-size: 16px;
    cursor: pointer;
}