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

body {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    font-family: 'Arial', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: #00ff00;
    text-shadow: 0 0 10px #00ff00;
}

.container {
    text-align: center;
    background: rgba(0, 0, 0, 0.7);
    padding: 30px;
    border: 3px solid #00ff00;
    box-shadow: 0 0 20px #00ff00;
}

h1 {
    font-size: 4em;
    margin-bottom: 20px;
    text-shadow: 0 0 20px #00ff00;
    animation: glow 2s ease-in-out infinite;
    letter-spacing: 10px;
}

@keyframes glow {
    0%, 100% {
        text-shadow: 0 0 10px #00ff00, 0 0 20px #00ff00;
    }
    50% {
        text-shadow: 0 0 20px #00ff00, 0 0 30px #00ff00;
    }
}

.score-board {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
    font-size: 1.5em;
    background: rgba(0, 255, 0, 0.1);
    padding: 10px;
    border: 2px solid #00ff00;
}

.player, .ai {
    font-weight: bold;
}

#pongCanvas {
    background: #000;
    border: 3px solid #00ff00;
    display: block;
    margin: 20px auto;
    box-shadow: 0 0 20px #00ff00, inset 0 0 10px rgba(0, 255, 0, 0.3);
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

.instructions {
    margin-top: 20px;
    font-size: 1em;
    color: #00ff00;
    background: rgba(0, 255, 0, 0.1);
    padding: 10px;
    border: 1px solid #00ff00;
    border-radius: 3px;
}

.instructions p {
    margin: 0;
    letter-spacing: 1px;
}