Refactor css

[dieghernan]

To improve maintainability:

• Nav Pills
• Overall review
• Attention to Navbar and search

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 33.96%. Comparing base (c43bb12) to head (c456e85).
⚠️ Report is 3 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #18   +/-   ##
=======================================
  Coverage   33.96%   33.96%           
=======================================
  Files           5        5           
  Lines         212      212           
=======================================
  Hits           72       72           
  Misses        140      140           

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