<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap 4 Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.1/dist/css/bootstrap.min.css">
<script src="https://cdn.jsdelivr.net/npm/jquery@3.6.0/dist/jquery.slim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.1/dist/umd/popper.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@4.6.1/dist/js/bootstrap.bundle.min.js"></script>
<style>
/*
*{
border: 1px solid #aaa;
}
*/
body{
background-color: gray;
}
div.row div{
border: 0px solid red;
}
.main_section{
background-color: aqua;
margin: 2px;
}
div.card{
margin: 5px;
}
li.list-group-item{
margin: 5px;
}
</style>
</head>
<body>
<nav class="navbar navbar-expand-md bg-dark navbar-dark">
<!-- Brand -->
<a class="navbar-brand" href="#">Navbar</a>
<!-- Toggler/collapsibe Button -->
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#collapsibleNavbar">
<span class="navbar-toggler-icon"></span>
</button>
<!-- Navbar links -->
<div class="collapse navbar-collapse" id="collapsibleNavbar">
<ul class="navbar-nav">
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
</ul>
</div>
</nav>
<br />
<!-- left menu -->
<div class="container">
<div class="row">
<div class="col-sm-3">
<div id="accordion">
<div class="card">
<div class="card-header">
<a class="card-link" data-toggle="collapse" href="#collapseOne">
Collapsible Group Item #1
</a>
</div>
<div id="collapseOne" class="collapse show" data-parent="#accordion">
<div class="card-body">
Lorem ipsum..
</div>
</div>
</div>
<div class="card">
<div class="card-header">
<a class="collapsed card-link" data-toggle="collapse" href="#collapseTwo">
Collapsible Group Item #2
</a>
</div>
<div id="collapseTwo" class="collapse" data-parent="#accordion">
<div class="card-body">
Lorem ipsum..
</div>
</div>
</div>
<div class="card">
<div class="card-header">
<a class="collapsed card-link" data-toggle="collapse" href="#collapseThree">
Collapsible Group Item #3
</a>
</div>
<div id="collapseThree" class="collapse" data-parent="#accordion">
<div class="card-body">
Lorem ipsum..
</div>
</div>
</div>
</div>
<div class="col">
<span class="badge badge-pill badge-light">Light</span>
<span class="badge badge-pill badge-dark">Dark</span>
</div>
</div>
<!-- center menu -->
<div class="col-sm-6">
<h1>Bootstrap Page</h1>
<p>This is some text.</p>
<div class="row">
<div class="col main_section">contents</div>
<div class="col main_section">contents</div>
</div>
<br />
<ul class="pagination">
<li class="page-item"><a class="page-link" href="#">Previous</a></li>
<li class="page-item"><a class="page-link" href="#">1</a></li>
<li class="page-item"><a class="page-link" href="#">2</a></li>
<li class="page-item"><a class="page-link" href="#">3</a></li>
<li class="page-item"><a class="page-link" href="#">Next</a></li>
</ul>
</div>
<!-- right menu -->
<div class="col-sm-3">
<ul class="list-group list-group-flush">
<li class="list-group-item">First item</li>
<li class="list-group-item">Second item</li>
<li class="list-group-item">Third item</li>
<li class="list-group-item">Fourth item</li>
<br />
<span class="badge badge-pill badge-info">Info</span>
</ul>
</div>
</div>
</div>
<br />
<nav class="navbar navbar-expand-sm bg-dark navbar-dark">
<!-- Brand -->
<a class="navbar-brand" href="#">Logo</a>
<!-- Links -->
<ul class="navbar-nav">
<li class="nav-item">
<a class="nav-link" href="#">Link 1</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link 2</a>
</li>
<!-- Dropdown -->
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbardrop" data-toggle="dropdown">
Dropdown link
</a>
<div class="dropdown-menu">
<a class="dropdown-item" href="#">Link 1</a>
<a class="dropdown-item" href="#">Link 2</a>
<a class="dropdown-item" href="#">Link 3</a>
</div>
</li>
</ul>
</nav>
</body>
</html>
