@media only screen and (max-width: 480px){
    .red{
        display: none;
    }
    header{
        height: 55px;
    }
    .ancho{
        width: 100%;
        margin: 0;
        padding: 0;
    }
    .logo {
        width: 100%;
        height: 35px;
        text-align: center;
        padding: 0;
        margin: 0;
    }
    .logo p a{
        width: 100%;
        font-size: 30px;
        margin: 0;
    }
    nav{
        width: 100%;
        text-align: center;
        padding: 0;
        margin: 0;
    }
    nav ul li a{
        font-size: 7px;
    }
    .ancho-letras{
        top: 70px;
    }
    .slideInUp{
        display: none;
    }
    .letras-slider h1{
        font-size: 35px;
    }
    .columnasx3{
        width: 100%;
    }
    .tablax4{
        width: 100%;
    }
    .tablaxd{
        width: 100%;
    }
}
@media only screen and (min-width: 481px) and (max-width: 768px){
    header{
        width: 100%;
        background: rgba(0,0,0,.7);
        height: 70px;
        position: fixed;
        z-index: 10;
    }
    .ancho{
        width: 80%;
        height: 70px;
        margin: auto;
    }
    .logo{
        width: 30%;
        height: 70px;
        /*background: blue;*/
        float: left;
        padding-top: 17px;
        box-sizing: border-box;
    }
    .logo p a{
        width: 100%;
        font-size: 30px;
        margin: 0;
    }
    nav{
        width: 70%;
        height: 70px;
        float: left;
        text-align: right;
        padding-top: 25px;
        box-sizing: border-box;
    }
    nav ul li{
        display: inline;
    }
    nav ul li a{
        font-size: 10px;
    }
    .ancho-letras{
        top: 100px;
    }
    .letras-slider h1{
        font-size: 35px;
    }
    .columnasx3{
        width: 100%;
    }
    .tablax4{
        width: 100%;
    }
    .tablaxd{
        width: 100%;
    }
}