tree 28bec43d117441cc0003d6150ed65bcb58f4c94c
parent e45ed915373802087ee17cb7e05e95605faa79ab
author Marc Kupietz <kupietz@ids-mannheim.de> 1786191191 +0200
committer Marc Kupietz <kupietz@ids-mannheim.de> 1786191191 +0200

Fix IDS theme heading and bar layout

The orange bar never reached the slide's top left corner and the headings
stayed centred, because several separate things were fighting:

- reveal.js keeps 4% of the display empty around the content (config
  `margin`, default 0.04). No CSS inside the slide can escape that box.
  Default it to 0 and add the breathing room back as slide padding.

- Draw the bar as two ::before segments, one on the title and one on the
  subtitle, each sized as a percentage of its own heading box. The bar
  then always ends at the bottom of the last heading, follows a wrapped
  heading, and needs no fixed heights. Slides without a subtitle reserve
  the room one would take, so the bar does not change height between
  slides.

- Reaching the window's physical left edge needs viewport / scale, and
  CSS cannot divide a length by a length. The template now publishes the
  letter-/pillarbox bands as --ids-band-left / --ids-band-top and the bar
  shifts out by that much; it falls back to 0px, which is already correct
  whenever the deck and display aspect ratios agree.

- Headings rendered in a regular-weight, regular-width fallback because
  korap.ids-mannheim.de/font/fira-condensed.css returns a 404 page rather
  than CSS. Load Fira Sans Extra Condensed from Google Fonts, weight 700.

- Paint the bar as flat #f6a800. orange_bar.png is two-toned, so
  stretching it over each segment left a pale seam where they met.

- Left-align body content with the heading text and put the IDS logo's
  top on the heading's cap line.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Change-Id: I199cb4f0c3b766c0774351922d05f171fdbd4e79