Ubuntu – Remove ugly fat bazel from gnome-terminal with multiple-tabs

gnome-terminalgui

When I start gnome-terminal it looks quite pleasant but when I open another tab it's borders turns ugly:

fat-ugly-gnome-terminal-bezel

How can I preserve thin bezel while using multiple tabs?

After some messing around, I figured it out.

Edit /usr/share/themes/Ambiance/gtk-3.0/apps/gnome-terminal.css and add:

 TerminalWindow .notebook {
   padding: 0;
   border-width: 0;
 }