[polymer] import all elements

pkg/polymer/lib/elements/polymer-overlay/polymer-overlay.css

+/*
+ * Copyright 2013 The Polymer Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file.
+ */
+
+/* Note that trbl: 0 + position: fixed will not 'fit to window'
+if a transform is applied to a parent of this element. That parent
+becomes the containing block; see:
+http://dev.w3.org/csswg/css3-transforms/#transform-rendering
+We address this by using script based positioning =(
+*/
+:host(.polymer-overlay:host) {
+        position: fixed;
+        z-index: 10;
+        outline: none;
+        display: none;
+        -webkit-transition: opacity 0.001s;
+        transition: opacity 0.001s;
+}
+
+:host(.revealed:host) {
+        display: block;
+        visibility: hidden;
+}
+
+:host(.revealed.opened:host) {
+        display: block;
+        visibility: visible;
+}
+
+.polymer-overlay {
+        position: fixed;
+        z-index: 10;
+        outline: none;
+        display: none;
+        -webkit-transition: opacity 0.001s;
+        transition: opacity 0.001s;
+}
+
+/*
+        The revealed class exists because it's necessary to 'show' a node
+        before applying a transition. When an overlay is opened, it is 
+        immediately revealed (display: block) and then asynchronously the 
+        opened or closing classes are added.
+
+        Because we don't want to actually show the node before a transition
+        or animation is applied, when the node is 
+        revealed, it is made display: block but visibility: hidden.
+        It is then made visibility: visible when it is opened.
+*/
+
+.revealed {
+        display: block;
+        visibility: hidden;
+}
+
+.revealed.opened {
+        display: block;
+        visibility: visible;
+}