katom types from ref/ in groups, @table :leading in lines of text and :rulesep, @code under txt, one table style attribute, literal-klammer options (from dev 2e453744f5e9)

kdesc --katoms is Klammertext rendered from ref/, the types in titled groups,
with --katoms full for the regex column.  @table :leading L is L lines of the
surrounding text in html as in pdf (default 1), and :rulesep spaces the
horizontal rules.  The html table has one style attribute, so :column_width
fractions take effect again.  @code and @source_listing render in plain
text; captions are numbered per kind there, and a table needs no blank line
around it.  @c takes :nd, and an option-shaped word before a bar inside
literal code is code.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

sks/font/css/font.css

@@ -4,6 +4,14 @@
     --serif: Libre Baskerville, serif;
     --sans-serif: Open Sans, sans-serif;
     --monospace:  Inconsolata, monospace;
+    /* The pitch of a line of body text, in em of the NOMINAL font size.
+       It is 1.5 rather than LaTeX's 1.2 because font-size-adjust (below)
+       draws the type larger than its nominal size -- EB Garamond by a
+       fifth -- and line-height is computed from the nominal one.  It is
+       the html counterpart of \baselineskip, and a klammer whose spacing
+       is stated in lines of text multiplies THIS (@table :leading), so a
+       table and the paragraphs around it cannot drift apart. */
+    --text_line_height: 1.5;
 }
 
 body {
@@ -32,7 +40,7 @@ h1, h2, h3, h4, h5 {
    place); this file assigns only the family. */
 
 p {
-    line-height: 1.5;
+    line-height: var(--text_line_height);
 }
 
 .plain {