Move the stylesheet of chess board into directory 'assets'.

assets/css/pgn4web.scss

@@ -0,0 +1,57 @@
+---
+---
+
+
+/* Enable the scrolling of chess board up to the page top */
+
+body, html { height: 100%; }
+#GameWrapper { min-height: 100%; }
+#GameBoardWrapper { position: relative; }
+
+
+/* Chess board */
+
+$squareSize: 56px;
+$boardBorderWidth: 4px;
+$boardSize: 8 * $squareSize + 2 * $boardBorderWidth;
+
+.boardTable {
+  width: $boardSize;
+  height: $boardSize;
+  border: $boardBorderWidth solid #663300;
+}
+.whiteSquare, .blackSquare {
+  width: $squareSize;
+  height: $squareSize;
+}
+.pieceImage {
+  height: $squareSize;
+  width: $squareSize;
+}
+.whiteSquare, .highlightWhiteSquare {
+  background: #ffcc99;
+}
+.blackSquare, .highlightBlackSquare {
+  background: #cc9966;
+}
+
+
+/* Game text */
+
+#GameText {
+  position: absolute;
+  top: 0;
+  bottom: 0;
+  left: $boardSize + 10px;
+  right: 0;
+
+  display: block;
+  overflow-y: auto;
+}
+.moveOn, .variationOn {
+  color: #fff;
+  background-color: #428bca;
+  &:hover {
+    background-color: darken(#428bca, 10%);
+  }
+}