<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Bootstrap Example</title>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<!-- Navigation Bar -->
<nav class="navbar navbar-expand-lg navbar-dark bg-dark fixed-top">
<a class="navbar-brand" href="#">My Website</a>
<div class="collapse navbar-collapse">
<ul class="navbar-nav">
<li class="nav-item active"><a class="nav-link" href="#">Home</a></li>
<li class="nav-item"><a class="nav-link" href="#" data-toggle="modal" data-target="#myModal">Open Modal</a></li>
<li class="nav-item"><a class="nav-link" href="#cards">Cards</a></li>
</ul>
</div>
</nav>
<!-- Main Content -->
<div class="container mt-5">
<h1>Welcome to My Bootstrap Website!</h1>
<div id="cards" class="row mt-3">
<div class="col-md-4">
<div class="card mb-4"><img src="https://via.placeholder.com/350" class="card-img-top" alt="Card image">
<div class="card-body">
<h5 class="card-title">Card 1</h5>
<p class="card-text">Description for Card 1.</p>
</div>
</div>
</div>
<div class="col-md-4">
<div class="card mb-4"><img src="https://via.placeholder.com/350" class="card-img-top" alt="Card image">
<div class="card-body">
<h5 class="card-title">Card 2</h5>
<p class="card-text">Description for Card 2.</p>
</div>
</div>
</div>
<div class="col-md-4">
<div class="card mb-4"><img src="https://via.placeholder.com/350" class="card-img-top" alt="Card image">
<div class="card-body">
<h5 class="card-title">Card 3</h5>
<p class="card-text">Description for Card 3.</p>
</div>
</div>
</div>
</div>
</div>
<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title">Modal title</h5>
<button type="button" class="close" data-dismiss="modal">×</button>
</div>
<div class="modal-body"><p>This is a simple modal example.</p></div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
<!-- Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.9.3/dist/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
</body>
</html>