id/views/partials/header.php

<header>
    <div>
        <a href="/" id="sitetitle">
            <span class="bc-1">Bye</span><span class="bc-2">Corps</span><span class="bc-3"> ID</span>
        </a>
    </div>

    <div>
        <a href="/auth/signup"><?= get_string("auth.signup") ?></a>
    </div>
</header>