* {
    padding: 0;
    margin: 0;
}


.nav_responsive_ul {
    display: none;

}

.nav {
    background-color: darkslateblue;

}

.nav_ul{
    background-color: darkslateblue;
    text-align: center;

}

.nav_li {
    display: inline-block;
    padding: 12px;
    color: #fff;
}

.nav_li:hover > a {
    color: #ccc;
}

.nav_li:hover {
    color: #ccc;
}

.nav_li a {
    color: #fff;
    text-decoration: none;
}

.nav_li i {
    box-sizing: border-box;
    text-align: center;
    margin-right: 5px;
}


.primerimagen {
    margin: 0;
    text-align: center;
    font-family: sans-serif;


}

.primerimagen_container {
    margin-bottom: -25px;
    padding: 0;
    background: url(../imagenes/fondoprimerimagen.jpg);   
    background-size: cover;
    background-position: center;
    font-family: sans-serif;
}

.titulocuerpo {
    padding-top: 15px;
    margin-bottom: 20px;
    text-align: center;
    font-family: 'Open Sans', sans-serif;
    color: teal;
}

.cuerpo {
    padding-top: -20px;
    padding-bottom: 33px;
    padding-right: 10px;
    padding-left: 10px;
    font-size: 20px;
    text-align: center;
    font-family: 'Open Sans', sans-serif;
    background-color:rgb(192, 192, 192);
}

.imagencuerpo {
    padding-bottom: 7px;
    background-color: black;
    display: inline-block;
    line-height: 3px;
    padding: 3px;
    box-sizing: content-box;
    margin: 2px;
    border-radius: 5px;
    border: 2px solid black;
    box-shadow: 5px 5px 15px black;

}
.imagencuerpo-responsive {
    display: none;
}

.parrafo1 {
    padding-top: 15px;
}


@media only screen and (max-width: 500px) {
    .nav_ul {
        display: none;
    }

    .nav {
        height: 37px;
        background-color: white;

    }

    .nav_responsive_ul {
        display: block;
        position: relative;
        width: 95.8%;
        height: 37px;

    }

  
    .nav_responsive_li {

        width: 100%;
        padding: 10px;
        background-color: darkslateblue;
    }

    .nav_responsive_li i {
        box-sizing: border-box;
        text-align: center;
        margin-right: 5px;
        width: 30px;
        color: white;
    }

    .nav_responsive_li a {
        color: white;
        display: absolute;
        text-decoration: none;
    }

    .primerimagen {
        margin: 0;
        text-align: center;
        padding-top: 120px;
        margin-bottom: -150px;
        height: 500px;
        font-family: sans-serif;
    }

    .primerimagen_container {
        margin: 0;
        padding: 0;
        background: url(../imagenes/fondoprimerimagen.jpg);   
        background-size: cover;
        background-position: center;
        font-family: sans-serif;
    }

    
    .titulocuerpo {
        text-align: center;
        font-family: 'Open Sans', sans-serif;
        color: teal;
    }
    .imagencuerpo {
        display: none;
    }

    .imagencuerpo-responsive {

        background-color: black;
        display: inline-block;
        line-height: 5px;
        padding: 4px;
        box-sizing: content-box;
        margin: 2px;
        border-radius: 5px;
        border: 2px solid black;
        box-shadow: 5px 5px 15px black;
    }
    .parrafo1 {
        display: block;
        padding-top: 20px;
    }
}