[polymer] import all elements

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

Index: pkg/polymer/lib/elements/polymer-overlay/polymer-overlay.css
diff --git a/pkg/polymer/lib/elements/polymer-overlay/polymer-overlay.css b/pkg/polymer/lib/elements/polymer-overlay/polymer-overlay.css
new file mode 100644
index 0000000000000000000000000000000000000000..344ae548deb888ef6b3b74ff560d9d3a62ad8b8a
--- /dev/null
+++ b/pkg/polymer/lib/elements/polymer-overlay/polymer-overlay.css
@@ -0,0 +1,61 @@
+/*
+ * 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;
+}