li { 
   margin: 0.5em 0;
   }

ul {
   margin: 1em 0;
}

nav ul, footer ul {
    font-family:'Helvetica', 'Arial', 'Sans-Serif';
    padding: 0px;
    list-style: none;
    font-weight: bold;
}

nav ul li, footer ul li {
    display: inline;
    margin-right: 20px;
}