body {
    font-family: 'Roboto', Arial, sans-serif;
    margin: 0;
}

main {
    margin: 8px;
}

nav {
    background-color: #333;
    padding: 1.5em;;
}

h1 {
    text-align: center;
    font-size: 2.5em;
}

ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

li a {
    font-size: 1.5em;
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    padding-left: 0.5em;
    padding-right: 0.5em;
}

footer {
    position: fixed;
    text-align: center;
    padding: 1em;
    background: #333;
    color: #fff;
    bottom: 0;
    left: 0;
    right: 0;
}