body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #000;
    font-family: 'Press Start 2P', cursive;
    color: #fff;
}

#gameContainer {
    position: relative;
    width: 400px;
    height: 600px;
}

#gameCanvas {
    border: 2px solid #0f0;
    box-shadow: 0 0 10px #0f0;
}

#startScreen, #gameOver {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    background-color: rgba(0, 0, 0, 0.8);
    padding: 20px;
    border: 2px solid #0f0;
    box-shadow: 0 0 10px #0f0;
}

h1, h2 {
    color: #0f0;
    text-shadow: 0 0 5px #0f0;
}

button {
    background-color: #0f0;
    color: #000;
    border: none;
    padding: 10px 20px;
    font-family: 'Press Start 2P', cursive;
    cursor: pointer;
    margin-top: 20px;
}

button:hover {
    background-color: #00ff00;
    box-shadow: 0 0 10px #00ff00;
}