new media player functionality

src/app/app.scss

@@ -8,6 +8,25 @@ app-navbar {
   z-index: 200;
 }
 
+// Mobile: navbar is taller (stacked brand text), so give the player room
+app-media-player {
+  position: fixed;
+  top: 64px;
+  left: 0;
+  right: 0;
+  z-index: 199;
+}
+
 main {
-  padding-top: 70px;
+  padding-top: 108px;
+}
+
+@media (min-width: #{$bp-md}) {
+  app-media-player {
+    top: 52px;
+  }
+
+  main {
+    padding-top: 96px;
+  }
 }