body {
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #232526, #414345);
    color: #fff;
    font-family: 'Segoe UI', Arial, sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    text-align: center;
    background: rgba(30, 30, 30, 0.9);
    padding: 2rem 2.5rem 2.5rem 2.5rem;
    border-radius: 18px;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
}

h1 {
    margin-bottom: 1rem;
    letter-spacing: 2px;
}

#pongCanvas {
    background: #171717;
    display: block;
    margin: 0 auto;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.3);
    max-width: 100%;
    height: auto;
}

#scoreboard {
    font-size: 2rem;
    margin: 1rem 0;
    letter-spacing: 2px;
}

#gameMessage {
    font-size: 1.2rem;
    margin: 0.5rem 0 1rem 0;
    height: 1.5rem;
    color: #ffd700;
}

.instructions {
    font-size: 1rem;
    color: #bbb;
    margin-top: 0.5rem;
}

@media (max-width: 800px) {
    .container {
        padding: 1rem;
    }
    #pongCanvas {
        width: 98vw !important;
        height: 55vw !important;
        max-width: 98vw;
    }
}