<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<nav class="navbar fixed-top navbar-expand-md custom-navbar navbar-dark">
<img class="navbar-brand" src="http://acmsocc.github.io/2016/assets/img/googlelogo_color_324x112dp.png" id="logo_custom" width="10%" alt="logo">
<button class="navbar-toggler navbar-toggler-right custom-toggler" type="button" data-toggle="collapse" data-target="#collapsibleNavbar">
<span class="navbar-toggler-icon "></span>
</button>
<div class="collapse navbar-collapse " id="collapsibleNavbar">
<ul class="navbar-nav m-auto ">
<li class="nav-item">
<a class="nav-link" href="#offer"><b>Our Offer</b></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#"><b>How it works</b></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#"><b>Benifits</b></a>
</li>
</ul>
<form class="form-inline ml-auto">
<input class="form-control mr-sm-2" type="text" placeholder="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
</form>
</div>
</nav>
