Currently, mobile users aren't able to see the content in either of the sidebars. To improve this lets try the following:
[x] Move the "song updated message"
[x] We could create a "copy song link" button at the bottom left, which is where that "updated" flash can live going forward.
Alternatively, the notification area in the top-left could be moved to the top-center at mobile, and could include the "audio-disabled message," as well as the "song updated message."
[x] Add the menu navigation
[x] Hamburger menu icon. Top left. Opens the left sidebar.
[x] Add the controls navigation
[x] Gear icon. Top right. Opens the right sidebar.
[x] Add more obvious close buttons to improve accessibility.
Currently, mobile users aren't able to see the content in either of the sidebars. To improve this lets try the following:
Reference the Material Navigation Drawer (including the one that the material.io website itself uses) for some basic open/close behaviors that feel pretty simple: https://material.io/develop/web/components/navigation-drawer