.nav .prev{
	font-size: 21px;
	text-decoration: none;
	color: #e3003b;
}
.nav .prev_active{ /* этого класса нет */
	font-size: 21px;
	text-decoration: none;
	color: #a5a5a5;
}
.nav .next{
	font-size: 21px;
	text-decoration: none;
	color: #e3003b;
}
.nav .next_active{
	font-size: 21px;
	text-decoration: none;
	color: #a5a5a5;
	cursor: default;
}