body {
    background-color: lightgrey;
    border-right: 10px solid navy;
    border-left: 10px solid navy;
    text-align: center;
}

nav {
    text-align: center;
    background-color: navy;
}

nav a {
    text-decoration: none;
    color: lightgrey;
    display: inline-block;
}

ul {
    list-style-type: none;
}

ol {
    list-style-type: none;
}

h1 {
    text-decoration: underline;
}

footer {
    background-color: navy;
    color: lightgrey;
    text-align: center;
}

footer a {
    text-decoration: none;
    color: lightgrey;
    display: inline-block;
}