css for Table of Contents

[mmattel]

When using a TOC (Table of Contents) which we force positioning by command
(:toc: macro and :toc:) somewhere in the document, we do not have a css rule for it which leads to the situation, that a defined toc title will be positioned and rendered like a standard text just underneath the text above. This is only an issue when force positioning, not with automatic positioning.
I have asked the Antora team about this and got the advice to add a css definition for it.

Here is an example code rendered by yarn antora

<div class="paragraph">
<p><code>occ</code> is in the owncloud/ directory; for example <code>/var/www/owncloud</code> on
Ubuntu Linux. <code>occ</code> is a PHP script. <strong>You must run it as your HTTP user</strong>
to ensure that the correct permissions are maintained on your ownCloud
files and directories.</p>
</div>
<div id="toc" class="toc">
<div id="toctitle" class="title">occ Command Directory</div>

As you can see, we reference to a toc id/class, but no definition has been made so far, at least I can´t find one. I am not a css guy, and would ask for help fixing that.

@settermjd @LukasHirt