@charset "utf-8";

.caja {
    width: 80%;
    margin-left: auto;
    margin-right: auto
}

.caja header {
    border: 1px solid #000;
    text-align: center;
    margin-bottom: 0.2em;
}

h1 {
    margin: auto;
}

nav ul {
    list-style-type: none;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: auto;
    gap: 0.2em;
    margin: 0;
    padding: 0;
    margin-bottom: 0.2em;
}

nav li {}

nav a {
    display: block;
    padding: 0.5em;
    text-align: center;
    text-decoration: none;
    border: 1px solid #000;
    color: #000;
}

nav a:hover {
    background-color: #66ff66;
}

.contenido {
    display: grid;
    grid-template-columns: 3fr 1fr;
    grid-template-rows: auto;
    gap: 0.2em;
}

article,
aside,
footer {
    border: 1px solid #000;
    padding: 0.2em;

}