body {
    margin: 0;
    padding: 0;
    background: #000;
    font-family: 'Courier New', monospace;
    color: #00ff00;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
}

#game-container {
    position: relative;
    border: 2px solid #00ff00;
    box-shadow: 0 0 20px #00ff00;
    background: #000;
}

#game-canvas {
    display: block;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
}

#ui {
    position: absolute;
    top: 10px;
    left: 10px;
    display: flex;
    gap: 20px;
    font-size: 16px;
    text-shadow: 0 0 5px #00ff00;
}

#game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    background: rgba(0, 0, 0, 0.9);
    border: 2px solid #00ff00;
    padding: 20px;
    box-shadow: 0 0 20px #00ff00;
}

#game-over h2 {
    margin: 0 0 10px 0;
    font-size: 24px;
    text-shadow: 0 0 10px #00ff00;
}

#game-over p {
    margin: 0 0 20px 0;
    font-size: 18px;
}

#restart-btn {
    background: #000;
    color: #00ff00;
    border: 2px solid #00ff00;
    padding: 10px 20px;
    font-family: 'Courier New', monospace;
    font-size: 16px;
    cursor: pointer;
    text-shadow: 0 0 5px #00ff00;
    box-shadow: 0 0 10px #00ff00;
    transition: all 0.3s;
}

#restart-btn:hover {
    background: #00ff00;
    color: #000;
    box-shadow: 0 0 20px #00ff00;
}

.hidden {
    display: none;
}

/* Retro scanlines effect */
#game-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 255, 0, 0.03) 2px,
        rgba(0, 255, 0, 0.03) 4px
    );
    pointer-events: none;
}