Replaces the light generic theme with a dark palette grounded in the
app's own subject matter (bike computer telemetry): electric-lime
accent, tabular monospace numerals for stats/timestamps, hairline
card borders instead of shadows, and visible focus rings. Every
template already shares the same classes, so no markup changes were
needed.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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