The amber warning alert used bg-amber-500/5 (5% opacity — nearly invisible)
and text-amber-900. The faint background combined with potential
tailwind-merge ambiguity between the Alert variant's text-foreground and
the override text-amber-900 resulted in poor readability in light mode.
Align with the established BitcoinPublicDisclaimer pattern:
- bg-amber-500/5 → bg-amber-50 (solid visible amber tint)
- text-amber-900 → text-amber-950 (darkest amber for max contrast)
- border-amber-500/50 → border-amber-300/60 + dark:border-amber-500/30
- dark:bg-amber-950/50 for a distinct dark-mode background
- Icon: !text-amber-500 → !text-amber-600 dark:!text-amber-400
No wallet logic, sweep behavior, or component structure changed.
filemon
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