Hello,
1°) From what I can see, it's quite normal that your css don't work, let's ecplain this :
Here the html code :
<span class="hikashop_category_name">
<a href="/index.php/luggage/category/32-panniers">
Shop - Panniers </a>
</span>
And so your selector must be :
".hikashop_category_name a" and with this your command Css must work.
2°) Sorry but so far, I don't see what you means by "Cancel and OK buttons from the persons address page" and so, can you provide an Url link or at least the context of this button displaying.
3°) You can modify the text by editing your Language file, see this in details,
here
.
4°) I don't know how did you get this title as it seems to be a custom, for me it's not from Hikashop default code.
I guess, that you can try to look in Main HikaShop Configuration, then in Display dropdown select Views.
Use your 3 dropdown filters with : checkout/ YourTemplate/ Front end
And if you have a little trash icon, that means that you have an override view or some custom code (html & php) that must be in step or show view
Regards