*{
    margin: 0;
    padding: 0;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    -o-box-sizing: border-box;
    box-sizing: border-box;

}

body{
    background: url(./img/sec6.jpg), black;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: cover;
    color: white;



}
header, main, footer{
    width: 80%;
    margin: 20px auto;
    max-width: 1120px; /*Esta sirve para establece un maximo en el que el texto se ajustaria a cada pantalla */
}
section,footer, aside{
    background: rgba(31, 31, 31, 0.6);
    border: 4px solid rgba(168, 168, 168, 0.44);
    border-radius: 10px;
}
header nav ul{
    background: rgba(31, 31, 31, 0.6);
    list-style: none;
    text-align: center;
    border-radius: 3px;

}
header nav ul li{
    display: inline-block;
    width: 110px;
}
header nav ul li a{
    display: block;
    padding: 10px 20px;
    color: #fff;
    text-decoration: none;
    font-weight: bold;
}
header nav ul li a:hover{
    background: rgba(0, 0, 0, 0.53);
    transition: 0.8s all ease;
}
img{
    padding: 1px;
    margin:1px;
    height: 120px;
    width: 150px;
}

main{
    display: flex;
    flex-flow: row nowrap;
    align-items: flex-start;
}
section{
    width: 70%;
    padding: 8px;
    /*display: inline-block;*/
}
aside{
    width: 27%;
    margin-left: 2%;
    padding: 8px;
    /*display: inline-block;*/
}
aside input[type="email"]{
    padding: 5px;
    width: 80%;
    font-weight: bold;
}
aside input[type="submit"]{
    background: rgba(0, 0, 0, 0.5);
    padding: 8px 15px;
    width: 50%;
    margin-top: 4px;
    border: 3px solid rgba(152, 152, 152, 0.5);
    border-radius: 20px;
    color: #fff;
    font-weight: bold;
}
aside input[type="submit"]:active{
    background: rgba(251,251,251, 0.54);
}
footer{
    border-radius: 5px;
    text-align: center;
    padding: 7px;
/*     border: 1px solid red; */
}
footer a:link{
    color: white;
}

footer a:visited{
    color: white;
}
@media screen and (max-width: 768px){
    header{
        margin: 0 4.9rem 1rem 4.9rem;
    }
    main{
        display: inline-block;
        margin: 0 4.9rem 0 4.9rem;
/*         border: 1px solid red; */
    }
    section{
        margin-bottom: 16px;
        width: 100%;
    }
    main .ca{
        margin:0;
        width: 100%;

    }
    footer{
        margin: 1rem 4.9rem 1.2rem 4.9rem;
    }
}