.mapa { margin: auto;
        display:block;
        max-height: 100em;
}


header {height: 3em;
        display: block;
        font-family: 'Raleway', sans-serif;}
        

nav { width: 90%;
     margin:auto;
    
    
}

header nav ul {list-style: none;
           display: flex;
            flex-direction: row;
            
}

header ul li a {display: block;
                text-decoration: none;
                font-weight: lighter;
                text-align: center;
               box-sizing: border-box;
               background-color: black;
               color: white;
               padding: 0.3em;
               align-items: stretch;
               font-size: 2em;
                justify-content: space-between;
}