fix(resume): complete CSS rewrite for simple, clean, readable layout

- Completely rewrote CSS based on CodePen examples
- Removed overly complex styling that was breaking layout
- Simple, clean design focused on readability
- Proper spacing without being excessive
- Blue accent color (#0066cc) for consistency
- Clean typography hierarchy
- Simple underlined links instead of fancy buttons
- Responsive two-column layout for skills/certifications
- Mobile-friendly navigation
- Professional, functional design

Author: erinmikailstaples