headerbar entry,
headerbar spinbutton,
headerbar button,
headerbar separator {
  margin-top: 0px;
  margin-bottom: 0px;
  min-height: 10px;
}

headerbar {
  min-height: 16px;
  padding-left: 2px;
  padding-right: 2px;
  margin: 0px;
  padding: 0px;
}

@define-color decoration_border_color COLOUR;

/* focused window */
decoration {
    border: 5px solid @decoration_border_color;
    background: @decoration_border_color;
}

/* unfocused window */
decoration:backdrop {
    border-color: @decoration_border_color;
    background-color: @decoration_border_color;
}

/* focused window (server-side rendering hack) */
.ssd .titlebar {
    border: 5px solid @decoration_border_color;
    border-bottom: none;
}

/* unfocused window (server-side rendering hack) */
.ssd .titlebar:backdrop {
    border-color: @decoration_border_color;
}

/* remove borders of maximized windows */
.maximized decoration,
.ssd.maximized .titlebar {
    border: none
}