styles.css

* {
    box-sizing: border-box;
}

body {
    background-color: Lavender;
    font-family: "Gill Sans", sans-serif;
    display: flex;
    flex-direction: column;
    text-align: center;
    align-items: center;
}

#juego {
    border: 1px solid black;
    background-color: LightSteelBlue;
    width: 600px;
}

p {
    margin: 0;
}

#score, #controles, #gameplay, #texto {
    display: flex;
    justify-content: space-around;
    border: 1px solid black;
    padding: 20px;
}

button {
    background: linear-gradient(white, CadetBlue);
    border: 2px solid CadetBlue;
    cursor: pointer;
    width: 100px;
    height: 40px;
    font-weight:bold;
}

@media (max-width: 600px) {
    #juego {
        width: 300px;
    }
    #controles {
        height: 200px;
        flex-direction: column;
        align-items: center;
    }
    button {
        width: 200px;
    }
}