The original prototype broke up the light page with two dark "Nacht"
bands (#1E1A14): the offer right after the hero, and the contact at the
end. Restored as .section-dark, which redefines the color variables
instead of overriding single rules, so cards, buttons, form fields and
placeholders all turn with it. Measured in the rendered DOM: 42 text
elements, 0 WCAG AA failures; form field borders 3.41:1.
Also fixes the missing space in "der Datenschutzerklärung" below the
contact form (Astro dropped the line break before the link).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>