Finish challenge using React

I have several issues when finish this project

1. On Desktop design, when hover on share button, I am unable to make the share icon become white.
2. On Mobile design, when click on share button, I have to use a trick to make the media share links (the rectangle thinking bubble) to cover the Author's information using media queries and offset (left, top,...). If the width is less than 375px then that element becomes weird.
3. On Mobile design, when click on share button, I am unable to make the share icon appears on top of the "rectangle thinking bubble"