I have created a copy, mirror of my site. Copied all files, export and import database. Exactly the same copy. However, the design of some elements is different, because the HTML markup is different. How is this even possible? Worth noticing that my default theme is Bootstrap subtheme, however, I am not rewriting any class at all. Even if yes, should be the same on both sites.
First difference: menu block with the Primary menu.
<ul class="menu nav" id="rm-no-id">
<ul class="menu" id="rm-no-id"> ('nav' class missing)
Another difference: primary tabs.
<ul class="tabs--primary nav nav-tabs">
<ul class="tabs primary">
Also buttons are different, etc... Any help will be much appreciated.