## Problem
In dark mode, `.node-full-card` and `.node-stats-table` (and all other
`var(--card-bg)` consumers) rendered with a background only ~11 RGB
units away from the page background:
- Page bg: `--surface-0` = `#0f0f23` (RGB 15,15,35)
- Card bg: `--surface-1` = `#1a1a2e` (RGB 26,26,46)
- Delta: ~11 units per channel → appears near-white on
OLED/high-contrast LCD screens
## Fix
Align `--card-bg` to `--surface-2` (`#232340`) in dark mode — the same
value already used for `--detail-bg` throughout the app. Delta from page
bg increases to ~35 units per channel, which reads clearly as an
elevated dark surface rather than a washed-out off-white card.
Both dark-mode variable blocks updated in sync (`@media
prefers-color-scheme: dark` + `[data-theme="dark"]`). Light mode is
unchanged.
## Impact
All `var(--card-bg)` consumers in dark mode get the corrected colour:
node full cards, stats tables, analytics cards, packet detail panels,
dropdowns, etc. The value now matches `--detail-bg` so cards and detail
panels use a consistent surface colour.
Closes#1470.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
