Merge pull request #5 from bbc/origin/master

Adjust styling to match previous presentations

* Non-white background colour
* More space under headings
* Lighter weight headings instead of bold
* Leave the case of headings alone
* Add padding at the top of slides to avoid clashing with the blocks

css/theme/source/bbc.scss

@@ -16,18 +16,19 @@
 @import url(https://gel.files.bbci.co.uk/r2.511/bbc-reith.css);
 
 // Override theme settings (see ../template/settings.scss)
-$backgroundColor: #fff;
+$backgroundColor: #F4F1F4;
 
 $mainColor: #222;
 $headingColor: #222;
 
 $mainFontSize: 42px;
 $mainFont: ReithSans, Helmet, FreeSans, Helvetica, Arial, sans-serif;
 $headingFont: ReithSerif, Helmet, FreeSans, Helvetica, Arial, sans-serif;
+$headingMargin: 0 0 $blockMargin+10px 0;
 $headingTextShadow: none;
 $headingLetterSpacing: normal;
-$headingTextTransform: uppercase;
-$headingFontWeight: 600;
+$headingTextTransform: none;
+$headingFontWeight: lighter;
 $linkColor: #2a76dd;
 $linkColorHover: lighten( $linkColor, 15% );
 $selectionBackgroundColor: lighten( $linkColor, 25% );
@@ -74,3 +75,7 @@ div.slides {
 .reveal table {
 	font-size: 90%;
 }
+
+.reveal .slides > section > section {
+	padding-top: 30px; 
+}