[css-ruby] Default stylesheet handles font-size correctly when rtc is used and rt is missing

Author: kojiishi

css-ruby/Overview.html

@@ -1413,9 +1413,11 @@ <h3 class="no-num heading settled" id=default-ua-ruby><span class=content>
 	<pre>ruby { display: ruby; }
 rb   { display: ruby-base; white-space: nowrap; }
 rp   { display: none; }
-rt   { display: ruby-text; white-space: nowrap; font-size: 50%; }
+rt   { display: ruby-text; }
 rbc  { display: ruby-base-container; }
 rtc  { display: ruby-text-container; }
+rtc, rt { white-space: nowrap; font-size: 50%; }
+rtc &gt; rt { font-size: inherit; }
 ruby, rb, rt, rbc, rtc { unicode-bidi: isolate; }</pre>
 
 	<p>Additional rules for UAs supporting the relevant features of <a data-biblio-type=informative data-link-type=biblio href=#biblio-css3-text-decor title=CSS3-TEXT-DECOR>[CSS3-TEXT-DECOR]</a> and <a data-biblio-type=informative data-link-type=biblio href=#biblio-css3-fonts title=CSS3-FONTS>[CSS3-FONTS]</a>:

css-ruby/Overview.src.html

@@ -1502,9 +1502,11 @@ <h3 id="default-ua-ruby" class="no-num">
 <!--	-->ruby { display: ruby; }
 <!--	-->rb   { display: ruby-base; white-space: nowrap; }
 <!--	-->rp   { display: none; }
-<!--	-->rt   { display: ruby-text; white-space: nowrap; font-size: 50%; }
+<!--	-->rt   { display: ruby-text; }
 <!--	-->rbc  { display: ruby-base-container; }
 <!--	-->rtc  { display: ruby-text-container; }
+<!--	-->rtc, rt { white-space: nowrap; font-size: 50%; }
+<!--	-->rtc > rt { font-size: inherit; }
 <!--	-->ruby, rb, rt, rbc, rtc { unicode-bidi: isolate; }</pre>
 
 	<p>Additional rules for UAs supporting the relevant features of [[CSS3-TEXT-DECOR]] and [[CSS3-FONTS]]: