body {
    margin: 0;
    overflow: hidden;
    background: #000;
    font-family: Arial, sans-serif;
}

#game-container {
    width: 100vw;
    height: 100vh;
}

#score {
    position: fixed;
    top: 20px;
    left: 20px;
    color: #fff;
    font-size: 24px;
    z-index: 100;
    text-shadow: 0 0 10px rgba(255,255,255,0.5);
}

#game-over {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    text-align: center;
    z-index: 100;
    background: rgba(0,0,0,0.8);
    padding: 20px 40px;
    border-radius: 10px;
    border: 2px solid #fff;
}

.hidden {
    display: none;
}