The max-w-screen-2xl wrapper now only constrains the header/nav,
matching blog layout. Dark content area goes full-width with its
own inner max-w constraint.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Wrap content block in bg-dark-800 so all existing dark-themed
templates render correctly without per-file migration.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>