one class seems to block visibility of another?
<p>I'm using the Semplice theme on a self-hosted Wordpress-site and have a problem with displaying the sub-menu. </p>

<p>I have only quite poor css-knowledge, but after hours of try &amp; error I have managed to make the disabled sub-menu re-appear again - at least it shows up partly. According to the visual overlay of my browser the sub-menu items are there, but only one of them gets displayed, the rest seem to be blocked by a different class!?
I've attached a screenshot to show you what I mean?!</p>

<p><a href="https://i.stack.imgur.com/9D6yR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9D6yR.png" alt="screenshot"></a></p>

<p>The submenu (vertical drowdown) sits under "units" and has six sub-nav items, but only one gets displayed, the others seem to be be hidden by the (hidden) responsive menu?! </p>

<p>I've tried the z-index but to no avail and now I'm really lost. I would greatly appreciate any help with this! Here's the site I'm working on:
<a href="http://s363619762.online.de/" rel="nofollow noreferrer">http://s363619762.online.de/</a></p>