Centering Link images inline …

If you’re not using a Child Theme, and if the theme doesn’t have a designated section of the dashboard for CSS modifications then install this Custom CSS Manager plugin https://www.ads-software.com/plugins/custom-css-manager-plugin

Then use its “CSS Code” section of the dashboard to hold your CSS modifications:

Alternatively use your Child Theme style.css file to hold your CSS modifications:

.site-header {
    text-align: center;
}

#horiz-wid-line div {
    display: inline-block;
}

I use Chrome’s developer tools to find this stuff out.
Here’s a useful tutorial for Chrome’s dev tools to help find CSS: https://dailypost.wordpress.com/2013/07/25/css-selectors/

Additional Chrome dev info:

* https://developers.google.com/chrome-developer-tools/
* https://developers.google.com/chrome-developer-tools/docs/dom-and-styles

Thanks Andrew! I use the developer tools as well and am self taught, but after an entire day of trying to figure this out (tried numerous things) I threw in the towel.
I am using a child theme – have to for this kind of stuff – and had issues with my cache not clearing so I couldn’t see the changes I implemented.
This worked brilliantly though, thank you very much!