Apply CSS style class to the top-level structure nodes, below the root

[ozross]

WCAG 2.1 Level AA, Success Criterion 1.4.12 "Text Spacing" has 4 rules:

• Line height (line spacing) to at least 1.5 times the font size;
• Spacing following paragraphs to at least 2 times the font size;
• Letter spacing (tracking) to at least 0.12 times the font size;
• Word spacing to at least 0.16 times the font size.

The latter 3 are pretty standard. The 1st can be set with a CSS class dictionary associated to the highest-level non-root structure element(s). Also, text in the main HTML window should not be more than 800px wide.

texlive-vpat-titlepage.pdf

Example coding:

94 0 obj
<</Type/StructElem/S/Art
/ID (Art.1)
/P 91 0 R
/K [  101 0 R
 ]
/Pg 90 0 R
 /C [/DocStyles]/A  14 0 R
/T (LaTeX Article)>>
endobj

ClassMap extract: incl. classes for alignment of h1 , h2 , h3 headings in HTML

 /DocStyles 82 0 R
 /DocStyles#20h1 83 0 R
 /DocStyles#20h2 84 0 R
 /DocStyles#20h3 84 0 R

82 0 obj
<< /O /CSS-3.00/display /block /width (800px) /margin /auto /padding (0px 0px) /line-height (1.5) >>
endobj
83 0 obj
<< /O /CSS-3.00/text-align /center >>
endobj
84 0 obj
<< /O /CSS-3.00/text-align /left >>
endobj