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

body {
    background: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    font-family: 'Courier New', monospace;
    color: #0f0;
}

#gameContainer {
    text-align: center;
}

canvas {
    border: 2px solid #0f0;
    background: #000;
    display: block;
    margin: 20px auto;
}

#info {
    display: flex;
    justify-content: space-between;
    max-width: 800px;
    margin: 0 auto 10px;
    font-size: 20px;
}

#gameOver {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.9);
    padding: 40px;
    border: 3px solid #0f0;
    display: none;
    text-align: center;
}

#gameOver h2 {
    font-size: 48px;
    margin-bottom: 20px;
}

#gameOver p {
    font-size: 24px;
    margin-bottom: 20px;
}

button {
    background: #0f0;
    color: #000;
    border: none;
    padding: 10px 30px;
    font-size: 20px;
    font-family: 'Courier New', monospace;
    cursor: pointer;
    margin: 5px;
}

button:hover {
    background: #0c0;
}

#instructions {
    margin-top: 20px;
    font-size: 14px;
    color: #0a0;
}

#difficultyMenu {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.95);
    padding: 40px;
    border: 3px solid #0f0;
    text-align: center;
}

#difficultyMenu h2 {
    font-size: 48px;
    margin-bottom: 20px;
}

#difficultyMenu p {
    font-size: 24px;
    margin-bottom: 20px;
}

#difficultyMenu button {
    display: block;
    width: 200px;
    margin: 10px auto;
}