Bug 532185: [Dark Theme] Help content does not respect styling

When the help content is displayed in the external browser the system
preferences about system wide dark or light appearance should be
respected.

There's a CSS standard coming for this: the prefers-color-scheme
media query (see
https://drafts.csswg.org/mediaqueries-5/#prefers-color-scheme ).

The CSS of the help content should incorporate this media
query.

Change-Id: Ib00fe072a2e8529ff5b16b550c6c28b3a92cfc18
Signed-off-by: Matthias Becker <ma.becker@sap.com>
diff --git a/packages/org.eclipse.epp.package.committers/book.css b/packages/org.eclipse.epp.package.committers/book.css
index b337d94..108ef89 100644
--- a/packages/org.eclipse.epp.package.committers/book.css
+++ b/packages/org.eclipse.epp.package.committers/book.css
@@ -113,4 +113,27 @@
 	border-width: 0px;
 	border-style: none;
 	vertical-align: middle;
+}
+
+@media (prefers-color-scheme: dark) {
+	body { 
+		color:      #f0f0f0; 
+		background: #3d3d3d;
+	} 
+	body, h1, h2, h3, h4, h5, h6, caption, p, 
+	table, td,  th, ul, ol, dl, li, dd, dt{
+		color: #f0f0f0;
+	}
+	
+	a:visited{
+		color: #75d7ff;
+	}
+	
+	a:link{
+		color: #3ac6ff;
+	}
+	
+	a:hover{
+		color: #f0f0f0;
+	}
 }
\ No newline at end of file
diff --git a/packages/org.eclipse.epp.package.committers/macosx_narrow_book.css b/packages/org.eclipse.epp.package.committers/macosx_narrow_book.css
index 344e5e4..cf531f0 100644
--- a/packages/org.eclipse.epp.package.committers/macosx_narrow_book.css
+++ b/packages/org.eclipse.epp.package.committers/macosx_narrow_book.css
@@ -1 +1,7 @@
-h1,h2           { color: Black }
\ No newline at end of file
+h1,h2           { color: Black }
+
+@media (prefers-color-scheme: dark) {
+	h1, h2{
+		color: #f0f0f0;
+	}
+}
\ No newline at end of file
diff --git a/packages/org.eclipse.epp.package.committers/narrow_book.css b/packages/org.eclipse.epp.package.committers/narrow_book.css
index 09a9aa1..8deb7bf 100644
--- a/packages/org.eclipse.epp.package.committers/narrow_book.css
+++ b/packages/org.eclipse.epp.package.committers/narrow_book.css
Binary files differ