Вроде все правильно но эффект не работает что делать то?
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-wvfXpqpZZVQGK6TAh5PVlGOfQNHSoD2xbE+QkPxCAFlNEevoEH3Sl0sibVcOQVnN" crossorigin="anonymous">
<link href = "css/bootstrap.min.css" rel = "stylesheet">
<link href = "mdb/css/mdb.min.css" rel = "stylesheet">
<title>Hello, world!</title>
<body>
<nav class="navbar fixed-top navbar-expand-lg navbar-dark white scrolling-navbar">
<div class="container">
<a href = "#" class="navbar-brand waves-effect">
<strong class="blue-text">AIB</strong>
</a>
</div>
</nav>
</body>
</html>
Простой
Средний