Replace `flex-shrink-0` with `shrink-0` across components for consistency
Migrate legacy color utility classes to inline hex Tailwind classes
Replace background color utility classes with inline hex equivalents
Delete unused SCSS style files for ScenicImageCard and RoutePlanCard
Refactor RoutePlanCard to use inline Tailwind styles instead of external CSS
Update icon component usage in RoutePlanCard to match project standards
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