{{ $current := . -}}
<header class="site-header">
    <div class="site-header__inner">
        <a class="site-header__logo" href="/" aria-label="Deepwater Survival – Startseite">
            <img src="/img/logo-crop.png" alt="Deepwater Survival" width="1600" height="675">
        </a>
        <nav class="site-nav" aria-label="Hauptnavigation">
            {{ range site.Menus.main -}}
            {{ $active := or (eq $current.RelPermalink .URL) (and (ne .URL "/") (hasPrefix $current.RelPermalink .URL)) -}}
            <a href="{{ .URL }}"{{ if $active }} aria-current="page"{{ end }}>{{ .Name }}</a>
            {{ end -}}
        </nav>
    </div>
</header>