.pierwszy {
	font-size: 40px; 
	color: #0000FF;
}
#unikat {
	text-decoration: underline;
	text-align: center;
}
p span {
	color: white;
	background: black;
}
body {
	margin: 0;
	padding: 0;
}
main {
	overflow: hidden;
}
.mainPage {
	float: left;
}
nav {
	width: 20%;
}
section {
	width: 79%;
}
a {
	display: block;
	text-align: center;
}