Seeking some assistance with a website design challenge I am facing. I am currently working on a one-page portfolio site with four #anchor points that serve as "pages". Each div has a height of 100% to fill the entire browser height. The header, which contains my logo and navigation, is fixed in position. I am looking to change the style of my header (logo and link color) when the user either clicks on a link or scrolls to the third and fourth #anchor points. I have been unable to solve this issue on my own, so any help would be greatly appreciated!