On scrolling down on the homepage the player bar would slide out of view and reappear only when scrolling back up.
The scroll interaction on the article page would be similar to the homepage except that when the user starts reading the content, the nav bar would be replaced by the share bar. When the user scrolls up again, both the player and nav bar reappear.
When the user hover's over a card item on desktop, the card would displace itself and push out a bit(~3-4px). The shadow spread would also increase as a result.