nav {
	position: sticky; top: 0;
	padding: 1rem;
	border-bottom: 1px solid #ddd;
	background-color: #F9F9F9;
}
nav ul {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	gap: 1rem; /* space between links */
	flex-wrap: wrap; /* wrap on small screens */
}
nav li {
	padding-right: 1em;
	border-right: 1px solid #ddd;
}
nav a {
	text-decoration: none;
	color: inherit;
	font-weight: bold;
}
nav a:hover {
	text-decoration: underline;
}