HTML5 & CSS

	
<nav>
  <a href="index.html">Strona główna</a>
  <a href="header.html">Nagłówek (header)</a>
  <a href="menu.html">Menu strony (nav)</a>
  <a href="content.html">Treść strony (main)</a> 
  <a href="footer.html">Stopka strony (footer)</a>
  <a href="o_mnie.html">O mnie</a>
</nav>

nav {
	background-color: yellowgreen;
	color: white;
	width: 20%;
	height: calc(100vh - 250px);
	float: left;
}
	

	
a {
	padding: 5px 15px;
	display: block;
	text-decoration: none;
	border: 1px solid black;
	background-color: lightgreen;
	color: black;
	margin: 5px;
}

a:hover {
	border: 2px solid white;
	background-color: green;
	color: yellow;
}