core-scroll-header-panel.css

/*
Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
Code distributed by Google as part of the polymer project is also
subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
*/

:host {
  display: block;
  position: relative;
  overflow: hidden;
}

#mainContainer {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  box-sizing: border-box;
  -moz-box-sizing: border-box;
  overflow-x: hidden;
  overflow-y: auto;
}

#headerContainer {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
}

.bg-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

#headerBg, #condensedHeaderBg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center center;
}

#condensedHeaderBg {
  opacity: 0;
}