Pure CSS Dropdown That's Clickable? : Anyone know if it's possible to implement a pure css dropdown that does not use the hover event, but is instead clickable?  Here's an example from [w3c schools using the hover event](https://www.w3schools.com/css/css_dropdowns.asp).  I'd like the same effect with pure css, however I'd also like it to be clickable in order for the menu to come down.  It has to be pure css though.