body {
    margin: 0;
    padding: 0;
    background-color: #111;
    color: #fff;
    font-family: 'Courier New', Courier, monospace;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}

#game-container {
    position: relative;
    border: 4px solid #333;
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.2);
}

#ui {
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    display: flex;
    justify-content: space-between;
    pointer-events: none;
}

#score-board {
    font-size: 20px;
    color: #0f0;
    text-shadow: 0 0 5px #0f0;
}

#game-over-screen {
    position: absolute;
    top: 200px;
    left: 0;
    right: 0;
    text-align: center;
    background: rgba(0, 0, 0, 0.8);
    padding: 20px;
}

#game-over-screen h1 {
    margin: 0 0 10px 0;
    font-size: 40px;
    color: #f00;
    text-shadow: 0 0 10px #f00;
}

#game-over-screen p {
    margin: 0;
    font-size: 18px;
    color: #fff;
}

canvas {
    background-color: #000;
    display: block;
}

.hidden {
    display: none !important;
}