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

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

canvas {
    background-color: #000;
    border: 2px solid #333;
    display: block;
}

#ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

#score, #level, #lives {
    padding: 20px;
    font-size: 24px;
    font-weight: bold;
    text-shadow: 2px 2px 0 #000;
}

#message {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 32px;
    text-align: center;
    background-color: rgba(0, 0, 0, 0.8);
    padding: 20px;
    border: 1px solid #fff;
    display: block; /* Controlled by JS */
}
    
#ui-layer div:nth-child(1) { order: 1; } /* Score */
#ui-layer div:nth-child(2) { order: 2; } /* Level */
#ui-layer div:nth-child(3) { order: 3; text-align: right; width: 100%; position: absolute; bottom: 0; right: 0; } /* Lives */
#ui-layer div:nth-child(4) { order: 4; } /* Message */

.hidden {
    display: none !important;
}