* {
    box-sizing: border-box;
}

body {
    display: flex;
    flex-direction: column;
    background-color: blanchedalmond;
    margin: 0;
    height: 100vh;
}

body>main {
    flex-grow: 1;
    margin: 5pt;
}

header,
footer {
    background-color: burlywood;
    position: sticky;
}

footer {
    bottom: 0;
}

header ul,
footer ul {
    list-style-type: none;
}

footer>nav>ul>li,
header>nav>ul>li {
    display: inline;
}

footer>nav>ul>li>a,
header>nav>ul>li>a {
    padding: 5pt;
    display: inline-block;
    text-decoration: none;
    color: inherit;
}

footer>nav>ul>li>a:hover,
header>nav>ul>li>a:hover {
    background-color: bisque;
}