1/* I have just tried running your code on a fresh WordPress install with
2the Neve theme installed. Its all working correctly, except do not use .
3container as a class for the flex box, instead use something like .
4container-flex.
5.container is already assigned to some HTML in the Neve theme.
6I was unable to gain access to the site you want to use this on. But if you
7just need to add this onto a page, use the Custom HTML block, paste in your
8HTML code and save the page. */
9
10<span> <div class ="container-flex">
11 <div class ="box-zeeland" > Zeeland </div>
12 <div class ="box-normandie" > Normandy </div>
13 <div class ="box-roffa" > Rotterdam </div>
14 <div class ="box-Valencia" > Valencia </div>
15 <div class ="box-Adam" > Amsterdam </div>
16 <div class ="overlay" > </div>
17 </div>
18</span>
19
20/* Then click on Customize > Additional CSS, and paste your CSS code in there
21and click Publish. Then your code should work as intended.*/