body {
    background-color: #1a1a1a;
    color: #00ff00;
    font-family: 'Courier New', Courier, monospace;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    overflow: hidden;
}

#game-container {
    text-align: center;
    position: relative;
}

canvas {
    background-color: #000;
    border: 2px solid #00ff00;
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.2);
    display: block;
}

#ui {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    font-size: 1.2rem;
}

#overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    padding: 20px;
    border: 2px solid #00ff00;
    text-align: center;
}

#instructions {
    margin-top: 10px;
    font-size: 0.8rem;
    color: #aaa;
}

button {
    background: #00ff00;
    color: #000;
    border: none;
    padding: 10px 20px;
    font-size: 1.1rem;
    font-family: inherit;
    cursor: pointer;
    margin-top: 10px;
}

button:hover {
    background: #00cc00;
}