Header

Header has the following design:

It has the following structure:

<header class="header">
        <nav class="navbar navbar-static-top">
                <a href="index.html" class="logo navbar-brand float-left text-white text-center">
                        <!--It contains logo-->
                </a>
        <div class="navbar-btn float-left sidebar-toggle">
             <div>
                   <div class="bar1 first"></div>
                   <div class="bar2 second"></div>
                   <div class="bar3 third"></div>
             </div>
        </div>
        <div class="top_right_nav">
             <div class="float-left">
                  <!--It contains Header Left side sections-->
             </div>
        </div>
        </nav>
</header>