chrome/browser/resources/net_export/net_export.css

/* Copyright (c) 2013 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.
 */

body {
  font-family: sans-serif;
  font-size: 80%;
}

button {
  font-size: 100%;
  font-weight: bold;
}

.warning {
  color: red;
}

#net-export-main {
  margin: 8px;
}