thank you. So, I just paste this code somewhere and it somehow works? Where do I paste it? SHould I create another joomla article? or paste in a module? or paste inside an email or something? I did create a custom.css file vefore but where do I put it? Do I paste those codes inside something? I have seen that browser tool thing 1000 times but it does not tell me where to put something. That is cearly not a beginner method.
SO, I am additionally confused now. If JS_Shadow is a theme, do I paste those codes inside that temef somewhere? Would that be inside the something.php file? perhaps somewhere inside a SCSS folder with some new file name? I do not know.... so I am asking for Beginner instructions.