f="../../index.html">
            <img src="../../_static/logo_straph.svg" class="logo" alt="logo">
        </a>


        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbar-menu"
                aria-controls="navbar-menu" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
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        <div id="navbar-menu" class="col-lg-9 collapse navbar-collapse">
            <ul id="navbar-main-elements" class="