guide for getting started creating styles

Is there a guide or tutorial to creating a new style for beginners?
Is it possible to fork existing styles?

Last and this is most specific, does anybody know how to modify style of hovered over element on Wikipedia? I want that element to be purely opaque so it forms a strong background, not translucent. I don't care if it goes back to original white or stays the modified color as long as you can clearly read the text.

I'm at week one of a web dev bootcamp btw so my skills are modest but they are going to grow! :)

Sign In or Register to comment.