:root {
    --colorfondo: #e6e6fe;
    --colorprincipal: #00008b;
    --colorsecundario: #3838b3;
    --colorfondo2: #f7f7ff;
    --negro: black;
    --blanco: white;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0px;
    padding: 0px;
    width: 80vw;
    margin: auto;
    background-color: var(--colorfondo);
    font-family: Arial, Helvetica, sans-serif;
}

header {
    background-color: var(--colorprincipal);
    color: var(--blanco);
    display: grid;
    grid-template-columns: 60% 40%;
    height: 140px;
    align-content: center;
    justify-content: center;
    align-items: center;
    padding-left: 50px;
    padding-right: 50px;
}

#menu {
    display: none;
}

header nav ul {
    list-style: none;
    padding: 0px;
    margin: 0px;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
    gap: 15px;
    padding-left: 65px;
    padding-right: 65px;
}

header nav ul li a {
    color: var(--blanco);
    text-decoration: none;
    font-size: 1.3em;
}

header form input[type="search"] {
    margin: auto;
    background-color: var(--colorfondo);
    font-family: Arial, Helvetica, sans-serif;
    width: 90%;
    border: 0px;
    border-radius: 4px;
    padding: 3px;
}

header form button {
    background-color: var(--colorprincipal);
    border: 0px;
    color: var(--blanco);
    padding: 4px;
    font-size: 1.3em;
}

main {
    background-color: var(--blanco);
    display: grid;
    grid-template-columns: 80% 20%;
}

main section {
    margin: 10px;
    background-color: var(--colorfondo2);
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 25px;
    padding: 10px;
}

main section article {
    color: var(--colorprincipal);
}

main section article img {
    width: 100%;
}

main section article div {
    display: grid;
    grid-template-columns: 75% 25%;
    align-items: center;
}

main section article div p {
    font-size: 0.9em;
    padding-right: 10px;
}

main section article div a {
    color: var(--blanco);
    background-color: var(--colorprincipal);
    padding: 15px;
    border-radius: 4px;
    text-decoration: none;
    text-align: center;
}

main nav {
    background-color: var(--colorsecundario);
    color: var(--blanco);
}

main nav ul {
    list-style: none;
    margin: 6px;
    padding: 0px;
}

main nav ul li a {
    color: var(--blanco);
    text-decoration: none;
    display: inline-block;
    margin-top: 7px;
}

footer {
    background-color: var(--negro);
    color: var(--blanco);
    text-align: center;
    padding: 60px;
}

footer>p {
    margin: 0px;
}

footer nav ul {
    list-style: none;
    padding: 0px;
    margin: 0px;
}

footer nav ul li {
    display: inline-block;
    margin: 15px;
}

footer nav ul li a {
    color: var(--blanco);
    text-decoration: none;
    font-size: 1.2em;
}

@media (width <=1176px) {

    body {
        width: 100vw;
    }

    header {
        grid-template-columns: 50% 50%;
        padding-left: 10px;
        padding-right: 10px;
    }

    header nav ul {
        gap: 7px;
        padding-left: 5px;
        padding-right: 5px;
    }

    header nav ul li a {
        font-size: 1.2em;
    }

    header form input[type="search"] {
        width: 75%;
    }

    header form button {
        padding: 2px;
    }

    main section article div {
        grid-template-columns: 60% 40%;
    }
}


@media (width <=780px) {
    header {
        background-color: var(--colorprincipal);
        color: var(--blanco);
        display: block;
        height: auto;
        padding: 10px;
    }

    #menu {
        display: block;
        font-size: 2em;
    }

    header nav,
    header form {
        display: none;
    }

    header nav ul {
        list-style: none;
        padding: 0px;
        margin: 0px;
        display: block;
    }

    header nav ul li a {
        color: var(--blanco);
        text-decoration: none;
        font-size: 1.3em;
    }


    main {
        display: grid;
        grid-template-columns: 1fr;
        grid-template-rows: auto auto;
        grid-template-areas: "categorias"
            "principal";
    }

    main section {
        grid-template-columns: 1fr;
        gap: 20px;
        grid-area: principal;
        margin: 0px;
    }

    main section article {
        border-bottom: 1px solid var(--colorfondo);
    }

    main nav {
        grid-area: categorias;
    }

    main nav ul {
        display: none;
    }

}


@media print {
    header {
        display: none;
    }

    main {
        display: block;
    }

    main section {
        margin: 0cm;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1cm;
        padding: 1cm;
        background-color: var(--blanco);
    }


    main section article div {
        grid-template-columns: 100%;
    }

    main section article div p {
        font-size: 1em;
        padding-right: 0px;
    }

    main section article div a {
        display: none;
    }


    main nav {
        display: none;
    }

    footer {
        display: none;
    }


}