Top-level main.css for all asciidoctor styles

Properly separate tocbot from asciidoctor styles and use main.css to
include both.

Author: rstoyanchev

gradle/docs.gradle

@@ -85,7 +85,7 @@ asciidoctor {
 	}
 	resources {
 		from(sourceDir) {
-			include 'images/**', 'tocbot-3.0.2/**'
+			include 'images/*', 'stylesheets/*', 'tocbot-3.0.2/*'
 		}
 	}
 	logDocuments = true
@@ -104,7 +104,7 @@ asciidoctor {
 			sectnums: '',
 			'source-highlighter': 'coderay@', // TODO switch to 'rouge' once supported by the html5 backend
 			stylesdir: 'stylesheets/',
-			stylesheet: 'spring.css',
+			stylesheet: 'main.css',
 			'spring-version': project.version
 
 }

src/docs/asciidoc/stylesheets/spring.css renamed to src/docs/asciidoc/stylesheets/asciidoctor-spring.css

@@ -1,21 +1,4 @@
 @import url(https://fonts.googleapis.com/css?family=Varela+Round|Montserrat:400,700);
-@import url('../tocbot-3.0.2/tocbot.css');
-
-/* See https://github.com/asciidoctor/asciidoctor/issues/699#issuecomment-321066006 */
-/* ================================================================================ */
-#tocbot a.toc-link.node-name--H1{ font-style: italic }
-@media screen{
-#tocbot > ul.toc-list{ margin-bottom: 0.5em; margin-left: 0.125em }
-#tocbot ul.sectlevel0, #tocbot a.toc-link.node-name--H1 + ul{
-  padding-left: 0 }
-#tocbot a.toc-link{ height:100% }
-.is-collapsible{ max-height:3000px; overflow:hidden; }
-.is-collapsed{ max-height:0 }
-.is-active-link{ font-weight:700 }
-}
-@media print{
-#tocbot a.toc-link.node-name--H4{ display:none }
-}
 /* ================================================================================ */
 
 /*! normalize.css v2.1.2 | MIT License | git.io/normalize */

src/docs/asciidoc/stylesheets/main.css

@@ -0,0 +1,23 @@
+/* https://github.com/bclozel/asciidoctor-stylesheet-factory/tree/spring */
+/* ===================================================================== */
+
+@import url('stylesheets/asciidoctor-spring.css');
+
+/* https://github.com/asciidoctor/asciidoctor/issues/699#issuecomment-321066006 */
+/* ============================================================================ */
+
+@import url('tocbot-3.0.2/tocbot.css');
+
+#tocbot a.toc-link.node-name--H1{ font-style: italic }
+@media screen{
+#tocbot > ul.toc-list{ margin-bottom: 0.5em; margin-left: 0.125em }
+#tocbot ul.sectlevel0, #tocbot a.toc-link.node-name--H1 + ul{
+  padding-left: 0 }
+#tocbot a.toc-link{ height:100% }
+.is-collapsible{ max-height:3000px; overflow:hidden; }
+.is-collapsed{ max-height:0 }
+.is-active-link{ font-weight:700 }
+}
+@media print{
+#tocbot a.toc-link.node-name--H4{ display:none }
+}