body {
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    margin: 2em;
    line-height: 1.5;
}

h1, h2 {
    color: #0080b7;
}

ul li {
    padding: 0.5em 0;
}

nav {
    text-align: right;
}

a {
    text-decoration: none;
    color: gray;
    padding: 0.5em;
}

a:hover {
    color: white;
    background-color: #0080b7;
}

@media (min-width: 768px) {
    body{
        width: 768px;
        margin: 2em auto;
    }
}