.barra-busqueda {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: #f3f3f3;
    font-family: 'Open Sans', sans-serif;
}

a {
    text-decoration: none;
}

.contenedor {
    width: 100%;
    max-width: 1100px;
    margin: auto;
}

/* ------------------------- */
/* HEADER */
/* ------------------------- */


header .encab {
    text-align: center;
    margin-bottom: 40px;
}

header .encab p {
    color: #9B9B9B;
}

header form {
    width: 100%;
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

header .barra-busqueda {
    width: 70%;
    height: 40px;
    line-height: 40px;
    background: #fff;
    padding: 0 20px;
    border-radius: 100px;
    border: none;
    text-align: center;
    font-size: 16px;
}

header .categorias {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

header .categorias a {
    color: #9B9B9B;
    margin: 10px 20px;
    font-size: 18px;
    font-weight: 700;
}

header .categorias a.activo {
    color: #000;
}

/* ------------------------- */
/* Grid */
/* ------------------------- */

.grid {
    position: relative;
    width: 100%;
    opacity: 0;
    transition: opacity 0.5s linear 1s;
}

.grid.imagenes-cargadas {
    opacity: 1;
}

.grid .item {
    position: absolute;
    display: block;
    padding: 0;
    margin: 10px;
    width: calc(33.333333% - 20px);
}

.grid .item-contenido {
    position: relative;
}

.grid .item img {
    width: 100%;
    cursor: pointer;
    vertical-align: top;
}

/* ------------------------- */
/* Overlay */
/* ------------------------- */
.overlay {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0,0,0,.9);
    width: 100%;
    height: 100vh;
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.overlay.activo {
    display: flex;
}

.overlay img {
    max-width: 100%;
}

.overlay .descripcion {
    display: block;
    background: #fff;
    padding: 20px;
    text-align: center;
    margin-top: 5px;
    border-radius: 10px;
    max-width: 50%;
}

.contenedor-img {
    position: relative;
}

.overlay #btn-cerrar-popup {
    background: none;
    font-size: 20px;
    color: #fff;
    border: none;
    cursor: pointer;
    position: absolute;
    right: -20px;
    top: 390px;
}


/* ------------------------- */
/* Mediaqueries */
/* ------------------------- */
@media screen and (max-width: 700px) {
    .grid .item {
        width: calc(50% - 20px);
    }

    header .barra-busqueda {
        width: 100%;
    }
}