CSS tweaks to OSM Player

It seems to me that the default player could use a couple tweaks. Currently, the divider between the controller and the playlist pager doesn't line up with the right side of the viewer. When the controller's visible, the divider just seems to be a little too far to the left; when the controller hides, the pager bar hangs into the viewer.

I'm using this to tweak the display:

.player-ui .minplayer-default-controls {
  width: 100%;
}

.player-ui .osmplayer-default-playlist-pager {
  left: 2px;
}

There's one more tweak I'd like to make, but so far have been unable to find the right selector: I want a bottom border on the viewer, so that when the controller auto-hides there's still something to set the viewer off from the shadow. Anyone know where that is?