nav a {
    font-size: 1em;
    text-decoration: none;
    text-align: center;
    color: black;
    padding: 0.75em;
    background-color: #eee;
}

nav a:hover {
    background-color: #ddd;
}

a.previous {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
}

a.next {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
}

body {
    margin-top: 3em;
}

* {
    box-sizing: border-box;
}

#grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
}

#grid a {
    padding: 2em;
    font-size: 2em;
    text-decoration: none;
    color: black;
    background: #eee;
    text-align: center;
    height: 20vh;
    border: 1px solid black;
}

#grid a:hover {
    background: #ddd;
}

body.home {
    margin: 0;
}