<header class="site-header outer no-cover">
  <div class="inner">
    <nav class="site-nav-center">
      {{ if .Site.Params.logo }}
      <a class="site-nav-logo" href="{{"/"|absURL}}"><img src="{{ .Site.Params.logo  | absURL}}" alt="{{ .Site.Params.Title }}" /></a>{{end}}
    </nav>  
  </div>
</header>