can someone explain it to me how this is made

    <div className={Css.Specifications}>
        <h3>Specifications</h3>
        <div className={Css.cards}>
            <div className={Css.card}>
                <h3>General Features</h3>
                <div className="features">
                    <div className={Css.feature}>
                        <div className="featureKey">Release Date</div>
                        <div className="featureValue">2022-02-20</div>
                    </div>
                </div>
            </div>
        </div>
      
    </div>