@font-face {
    font-family: 'RobotoR';
    src: url('../fonts/Roboto-Regular.ttf') format('truetype');
    font-style: normal;
    font-weight: normal;
}

@font-face {
    font-family: 'RobotoL';
    src: url('../fonts/Roboto-Light.ttf') format('truetype');
    font-style: normal;
    font-weight: normal;
}

@font-face {
    font-family: 'RobotoB';
    src: url('../fonts/Roboto-Black.ttf') format('truetype');
    font-style: normal;
    font-weight: normal;
}

@font-face {
    font-family: 'RobotoBo';
    src: url('../fonts/Roboto-Bold.ttf') format('truetype');
    font-style: normal;
    font-weight: normal;
}

@font-face {
    font-family: 'RobotoTh';
    src: url('../fonts/Roboto-Thin.ttf') format('truetype');
    font-style: normal;
    font-weight: normal;
}

body {
    background-image: url("../imagenes/fondo4.jpg");
    background-attachment: fixed;
    flex-wrap: wrap;
    overflow-x: hidden;
}

nav {
    background-image: url("../imagenes/fondo3.jpg");
    background-attachment: fixed;
    font-family: 'RobotoBo';
    font-size: 100%;
    border: gray 10px solid;
    position: fixed;
    float: left;
    width: 15%;
    max-width: 280px;
    text-align: left;
    display: inline;
}

nav ul {
    padding-left: 10%;
    padding-right: 10%;
}

nav ul li {
    list-style: none;
    padding-top: 2%;
    padding-bottom: 5%;
}

section {
    background-image: url("../imagenes/fondo3.jpg");
    background-attachment: fixed;
    border: gray 10px solid;
    margin-left: 20%;
}

section main h1 {
    border-left: none;
    border-top: blue 8px solid;
    border-right: none;
    border-bottom: blue 8px dotted;
    font-size: 200%;
    color: blue;
    text-align: center;
}

main div {
    column-count: 2;
}

article {
    margin-top: 0px;
    margin-left: 7%;
    margin-bottom: 20%;
}

article img {
    margin-right: 10%;
}

header h1 {
    color: yellow;
    border: silver 27px solid;
    border-image-source: url("../imagenes/borde1.png");
    border-image-slice: 27;
}

h1 {
    border: gray 10px solid;
    text-align: center;
    font-size: 300%;
    font-family: 'RobotoBo';
}

h2 {
    border-bottom: red 5px solid;
    font-size: 150%;
    font-family: 'RobotoL';
}

p {
    font-family: 'RobotoR';
    column-count: 2;
    margin-top: 1%;
    font-size: 100%;
}

footer {
    margin-top: 0.2%;
    text-align: center;
    font-family: 'RobotoTh';
    font-size: 100%;
    color: white;
    background-color: black;
}

footer p {
    border: silver 30px solid;
    border-image-source: url("../imagenes/borde2.png");
    border-image-slice: 70;
    border-image-repeat: round;
}

span a {
    padding-top: 40%;
    font-size: 240%;
}

#contenedor {
    margin: 0 auto;
    width: 100%;
    max-width: 1920px;
}

@media (max-width: 767px) {

    nav {
        max-width: 715px;
        width: 0%;
        height: 0%;
        margin: 0% 0% 0% 0%;
        float: none;
        position: static;
    }

    #menu  {
        column-count: 1;
        border: gray 10px solid;
        background-image: url("../imagenes/fondo2.jpg");
    }

    p{
        column-count: 1;
    }

    section {
        margin-left: 0%;
    }

    article img { 
        float: left;
    }

    section div {
        column-count: 1;
    }

    article {
        margin-bottom: 5%;
    }
}

@media (min-width: 768px) and (max-width: 1199px) {
   
    nav {
        max-width: 715px;
        width: 0%;
        height: 0%;
        margin: 0% 0% 0% 0%;
        float: none;
        position: static;
    }

    #menu  {
        column-count: 1;
        font-size: 150%;
        border: gray 10px solid;
        background-image: url("../imagenes/fondo2.jpg");
    }
    
    ul {
        column-count: 2;
    }

    ul li a{
        column-count: 0;
        display: inline;
        padding-left: 1%;
        padding-right: 1%;
    }

    section {
        margin-left: 0%;
    }

    article img { 
        float: left;
    }

    section div {
        column-count: 1;
    }

    article {
        margin-bottom: 5%;
    }
}