Tailwind's default opacity scale only includes multiples of 5.
The `/92` modifier in `dark:bg-[#1b2331]/92` was silently ignored,
causing the light-mode card background to render in dark mode.
Changed to `/[0.92]` which uses Tailwind's arbitrary value syntax.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>