/* PART 2 */
* {
    font-family: Arial, Helvetica, sans-serif;
}

nav {
    display: block;
    width: 60px;
}

section {
    padding-top: 100px;
    padding-bottom: 100px;
}

section a:hover {
    color: gold;
}

section a:focus {
    color:orange;
}

p {
    width: 200px;
}

/* PART 3 */
.btn {
    background-color: lightblue;
    border-color: darkblue;
}

.btn:hover {
    background-color: darkblue;
}

.btn:focus {
    background-color: green;
}