#tarjeta img{
 margin-bottom: 10%;
}

#container-tarjeta p{
    text-align: justify;
}


@media screen and (min-width: 501px) and (max-width:775px) {
    .txt-courses{
        margin-top: 20%;
    }
}
    @media screen and (min-width: 220px) and (max-width:500px) {
        .txt-courses{
            margin-top: 32%;
        }

}