* 
{
    font-family: 'Open Sans', sans-serif;
    padding: 0;
    margin: auto;
    list-style: none;
    text-decoration: none;
}

/* HEADER hasta 500px */

header
{
    color: aliceblue;
}

nav 
{
    width: 100%;
    padding: 0.5em;
    background-color: gray;
    font-weight: 700;
    font-size: 0.8rem;
    box-shadow: 0px 6px 6px -6px #000;
    text-align: center;
}

nav ul 
{
    list-style: none;
}

nav ul li 
{
    margin: 3;
}

nav ul li a 
{
    text-decoration: none;
    color: aliceblue;
}

nav ul li a:hover 
{
     color:#ffba00; 
     text-decoration:none; 
     cursor:pointer;  
}

/* CUERPO */

body
{
    background-color: aliceblue;
}

main
{
    text-align: center;
    background-color:white;
    color:#333;
    width:65%;
    height: auto;
    padding: 1em;
    margin-bottom: 2em;
    margin-top: 2em;
    box-shadow: 6px 6px 6px -6px #000;
}

li 
{
    list-style: none;
}


/* FOOTER universal */

footer 
{
    text-align: center;
    font-weight: 300;
    font-size: 0.8rem;
    position: absolute;
    bottom: 0;
    width: 100%;
    height: auto;
    background-color: gray;
    color: aliceblue;
    padding: 4;
}

/* HEADER desde 500px */

@media only screen and (min-width: 500px) 
{
   nav ul 
    {
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
        -webkit-box-align: center;
            -ms-flex-align: center;
                align-items: center;
        font-weight: 700;
        font-size: 1rem;
    }
    
    nav ul li 
    {
        -webkit-box-flex: 0.6;
        -ms-flex-positive: 0.6;
        flex-grow: 0.6;
    }
}