Presidio: Change font size, color, and alignment of the interstitial widget titles

Use the code below to adjust the font size, color, and alignment of all the widget titles displayed within Presidio’s interstitials. Note this code will only impact interstitials within the blog feed—it won’t update the font size of the featured interstitial title (view that Code Hack here). Additionally, implementing this code will update ALL interstitial titles, not just a single one.

Here's what this Code Hack looks like in action:

And here's the code you need to implement it: