<!DOCTYPE html> <meta charset="UTF-8"> <title>Empty ruby base container</title> <link rel="author" title="Xidorn Quan" href="https://www.upsuper.org"> <link rel="help" href="https://drafts.csswg.org/css-ruby-1/#ruby-layout"> <link rel="match" href="empty-ruby-base-container-ref.html"> <div style="font-size: 64px; line-height: 3">a<ruby><rt>b</rt></ruby>c</div>