Article Series - Fix Layout

• inline and block fixed-width font have the same x-height as proportional font
• Inline Links: No additional padding
• Bold and normal text: Higher contrast
• Long words: Automatic, language-aware, nondestructive hyphenation (so you can copy it and the hyphens vanish)
• Headings: Balanced line-lengths
• Title: Break out of the center-column
• Headings: Demote by 1 from md to html
• h2 in markdown (h3 in html): becomes rubric
• Main column: Select scale bracket for text so that 50 characers fit a line
• Main column: Select scale bracket for line-height so that line-distance harmonises with brackets

This is a quickfix. A more thorough refactor is in the making. It'll address dx pains as well as smarter prevention of edge cases. Follow up #96 (closed)

closes #95 (closed)