body {
    font-family: sans-serif;
    max-width: 600px;
    margin: 2rem auto;
    padding: 0 1rem;
}

a {
    color: #2b6cb0;
}

li {
    margin: 0.4rem 0;
}

li a {
    text-decoration: none;
}

li a:hover {
    text-decoration: underline;
}

.done a {
    color: #888;
    text-decoration: line-through;
}