chrome/browser/resources/options/subpages_tab_controls.css

/*
Copyright (c) 2010 The Chromium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
*/

.subpages-nav-tabs .inactive-tab {
  background: -webkit-gradient(linear,
                               left top,
                               left bottom,
                               from(white),
                               to(#f3f3f3));
  border-bottom: 1px solid #a0a0a0;
  padding: 4px 8px;
}

.subpages-nav-tabs .active-tab {
  background: white;
  border: 1px solid #a0a0a0;
  border-bottom: 1px solid white;
  -webkit-border-top-left-radius: 3px;
  -webkit-border-top-right-radius: 3px;
  font-weight: bold;
}

.subpages-nav-tabs {
  padding: 4px;
  border-bottom: 1px solid #A0A0A0;
  background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(white), to(#F3F3F3));
  margin-bottom: 15px;
}

.subpages-tab-contents {
  display: none;
   -webkit-padding-start: 10px;
}

.active-tab-contents {
  display: block;
}