Publish Vulpes Preview 15 sources for desktop, Android and Tundra

Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.

gaia/tv_apps/app-deck/style/app_deck.css

@@ -0,0 +1,76 @@
+html {
+  font-size: 10px;
+  /* We have Fira Sans as default font in real device. But it isn't default in
+   * browser. That's the main reason this line is here.*/
+  font-family: "Fira Sans";
+}
+
+html, body {
+  width: 100%;
+  height: 100%;
+  overflow: hidden;
+  margin: 0;
+  padding: 0;
+  background-color: white;
+}
+
+a {
+  outline: 0;
+}
+
+a:hover, a:active, a:focus {
+  outline: 0;
+}
+
+section {
+  font-size: 1.6rem;
+}
+
+#main-section {
+  position: absolute;
+  width: 100%;
+  height: 100%;
+  overflow: hidden;
+}
+
+#app-deck-grid-view-container {
+  width: 100%;
+  height: calc(100% - 46.6rem);
+  position: absolute;
+  left: 0;
+  bottom: 0;
+  background-color: #e0e0e0;
+}
+
+#app-deck-grid-view {
+  /* top = (6 - 5.8)rem */
+  padding: 0.2rem 14.2rem 0;
+  height: 100%;
+  overflow: hidden;
+  scroll-behavior: smooth;
+}
+
+#app-deck-grid-view:after {
+  content: "";
+  display: block;
+  /* app-deck-grid-view has padding-top 0.2rem, and the buttons in the first row
+     have margin-top 5.8rem, so app-deck-grid-view bottom should have height
+     5.8 + 0.2 - 2.9(button margin-bottom) = 3.1rem */
+  height: 3.1rem;
+}
+
+smart-button[type="app-button"] {
+  width: 18rem;
+  height: 18rem;
+  background-color: transparent;
+  background-repeat: no-repeat;
+  margin: 5.8rem 2.6rem 2.9rem 2.6rem;
+  background-size: 100% auto;
+}
+
+/** we use :after as label */
+smart-button[type="app-button"]:after {
+  width: 18rem;
+  height: 5rem;
+  font-size: 1.6rem;
+}