* {
    box-sizing: border-box;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

body {
    background-color: #f5f5f5;
}

/* NAV */
.navbar ul {
    display: flex;
    justify-content: center;
    background-color: #2f4f4f;
    list-style: none;
}

.navbar li a {
    color: white;
    padding: 15px 20px;
    display: block;
    text-decoration: none;
}

.navbar li a:hover {
    background-color: #3e6b6b;
}

/* CONTENIDO */
.contenedor {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    padding: 30px;
}

.columna img,
.producto img {
    width: 100%;
}

/* PRODUCTOS */
.producto {
    background: white;
    padding: 15px;
    border-radius: 5px;
}

.precio {
    font-weight: bold;
    color: #2f4f4f;
}

/* FOOTER */
.footer {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    background-color: #2f4f4f;
    color: white;
    padding: 20px;
    text-align: center;
}

/* MEDIA QUERIES */

/* Mediano */
@media (max-width: 900px) {
    .contenedor {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Pequeño */
@media (max-width: 600px) {
    .contenedor {
        grid-template-columns: 1fr;
    }

    .navbar ul {
        flex-direction: column;
    }

    .footer {
        grid-template-columns: 1fr;
    }
}