@import url('https://fonts.googleapis.com/css2?family=Press+Start+2P&display=swap');

body {
    background: #000;
    margin: 0;
    padding: 0;
    font-family: 'Press Start 2P', cursive;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    height: 100vh;
    overflow: hidden;
    color: #fff400;
}

#gameTitle {
    color: #fff400;
    text-align: center;
    font-size: 22px;
    margin: 20px 0;
    text-shadow: 2px 2px 0 #000, 0 0 10px #ff0;
}

#gameContainer {
    position: relative;
}

#pongCanvas {
    background: #3b0063;
    border: 6px solid #fff400;
    border-radius: 8px;
    display: block;
    max-width: 95vw;
    height: auto;
    box-shadow: 0 0 25px #ff0, inset 0 0 10px #ff0;
}

#score {
    position: absolute;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 18px;
    text-shadow: 2px 2px 0 #000, 0 0 8px #fff400;
    user-select: none;
    z-index: 5;
}

#gameMessage {
    position: absolute;
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #00ffff;
    font-size: 18px;
    text-align: center;
    text-shadow: 2px 2px #000, 0 0 8px #0ff;
    display: none;
    z-index: 10;
}

#restartBtn {
    position: absolute;
    top: 55%;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    font-size: 14px;
    background-color: #fff400;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    color: #000;
    display: none;
    box-shadow: 0 0 10px #fff400, 2px 2px #000;
    font-family: 'Press Start 2P', cursive;
}

#rulesOverlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000000ee;
    color: #fff400;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    z-index: 999;
    padding: 20px;
    font-family: 'Press Start 2P', cursive;
    animation: flicker 1.2s infinite alternate;
}

#rulesOverlay h2 {
    font-size: 20px;
    margin-bottom: 20px;
    text-shadow: 1px 1px 0 #000, 0 0 6px #fff400;
}

#rulesOverlay ul {
    list-style: none;
    padding: 0;
    font-size: 12px;
    margin-bottom: 30px;
    line-height: 1.6;
}

#rulesOverlay li {
    margin: 10px 0;
}

#startBtn {
    padding: 12px 24px;
    font-size: 12px;
    background-color: #fff400;
    color: #000;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    box-shadow: 0 0 10px #fff400, 2px 2px #000;
    font-family: 'Press Start 2P', cursive;
}

@keyframes flicker {
    from { opacity: 1; }
    to { opacity: 0.85; }
}

@media (max-width: 600px) {
    #gameTitle {
        font-size: 16px;
    }

    #rulesOverlay h2 {
        font-size: 16px;
    }

    #rulesOverlay ul {
        font-size: 10px;
    }

    #gameMessage {
        font-size: 14px;
    }

    #restartBtn,
    #startBtn {
        font-size: 12px;
        padding: 10px 18px;
    }
}