body {
    margin: 0;
    padding: 0;
    background-color: #000;
    color: #fff;
    font-family: 'Courier New', Courier, monospace;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}

#game-container {
    position: relative;
    height: 100vh;
    max-height: 800px;
    aspect-ratio: 3 / 4;
    border: 2px solid #333;
    background-color: #000;
}

#ui {
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    display: flex;
    justify-content: space-between;
    font-size: 20px;
    z-index: 10;
}

#gameCanvas {
    width: 100%;
    height: 100%;
    display: block;
    background-color: #000;
}

#game-over {
    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 #fff;
    z-index: 20;
}

#game-over.hidden {
    display: none;
}

#game-over h1 {
    color: #f00;
    font-size: 40px;
    margin-bottom: 20px;
}

#restart-btn {
    background-color: #fff;
    color: #000;
    border: none;
    padding: 10px 20px;
    font-size: 20px;
    cursor: pointer;
    font-family: inherit;
    margin-top: 20px;
}

#restart-btn:hover {
    background-color: #ddd;
}