Menu bar is covering title of the site

Hi!

I am usig theme Lovebond Lite and in preview the menu bar is not covering the site title (everything is ok), but when I go to my site (https://naturalproductsbabies.siterubix.com/ )they are covering when I scroll to the top.
I don¨t know how to fix this/what is wrong.

Thank you for your help!
Nina