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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #1a1a2e;
    color: #eee;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.game-container {
    position: relative; /* Essential for absolute positioning of overlay */
    text-align: center;
    background: #16213e;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    border: 1px solid #0f3460;
}

.game-container h1 {
    font-size: 2.2rem;
    margin-bottom: 0.8rem;
    color: #e9ff60;
}

.score-board {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.score-board span {
    background: #0f3460;
    padding: 0.3rem 0.8rem;
    border-radius: 6px;
}

#gameCanvas {
    border: 2px solid #e9ff60;
    border-radius: 8px;
    background: #0a0a1a;
    display: block;
    margin: 0 auto;
    image-rendering: pixelated;
}

.controls p {
    margin: 0.5rem 0;
    font-size: 0.95rem;
    color: #aaa;
}

#restartBtn {
    margin-top: 0.8rem;
    padding: 0.6rem 1.5rem;
    font-size: 1rem;
    background: #e9ff60;
    color: #000000;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s;
}

#restartBtn:hover {
    background: #c73050;
}

#gameOverOverlay {
    /* Fix: Use relative positioning within game-container and ensure it's on top */
    position: absolute;
    top: 6rem; /* Position over the canvas */
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.85);
    color: #fff;
    padding: 1rem 2rem;
    border-radius: 10px;
    font-size: 1.3rem;
    text-align: center;
    z-index: 100; /* Ensure overlay is above everything */
    display: none;
    /* Fix: Allow pointer events only when shown */
    pointer-events: none;
}

#gameOverOverlay.show {
    display: block;
    pointer-events: auto;
}