The previous approach using 'opacity: 1' and CSS variable
'var(--mui-palette-background-paper)' did not work because:
- CSS variable can resolve to semi-transparent rgba() values
- opacity property does not affect background color alpha channel
- Semi-transparent background allowed backdrop to bleed through
Solution:
- Use explicit opaque hex colors (#ffffff light, #1e1e1e dark)
- CSS media query for dark mode: @media (prefers-color-scheme: dark)
- Unique class name per namespace to avoid conflicts
- Maintains proper text color with CSS variable fallbacks
Root cause identified by debugger agent: opacity multiplies element
rendering but does NOT fix backgroundColor alpha transparency.
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via [Happy](https://happy.engineering)
Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>
Chris Farhood
ade6bf93a7