body {
    margin: 0px;
    font-family: Arial, Helvetica, sans-serif;
    background-color: lightgrey;
}

main {
    padding: 10px;
}

nav {
    background-color: #808080;
    padding: 5px;
}

ul {
    list-style-type: none;
}

li a {
    color: #F1FAEE;
    font-size: 30px;
    width: 120px;
    display: inline-block;
    padding: 2px;
    border-radius: 4px;
}

li {
    display: inline;
    padding-left: 2px;
    column-width: 20px;
}

a {
    text-decoration: none;
    text-align: center;
}

li a:hover {
    background-color: #CCC;
    color: #000;
}

footer {
    background-color: #808080;
    text-align: center;
    color: white;
    position: fixed;
    bottom: 0px;
    width: 100%;
    padding: 20px;
    margin: 5px auto 0 auto;
}