header {
    h1 {background-color:lightcyan;}
}

nav {
    background-color: honeydew;
    margin: 10px 10px 0px 10px;
}

nav ul {
    margin:0px;
    list-style-type: none;
    padding: 5px 0px 5px 0px;
}

nav ul li {
    display:inline;
    padding:5px 10px 5px 10px;
}