Urgent Website CSS & JavaScript Revamp

I need an experienced developer to update the CSS and Java Script in an old website. The primary goal is to enhance the responsiveness of the website.

Key requirements:
- Enhance responsiveness for mobile phones, tablets, and desktops
- Maintain the current design integrity while making the website more versatile
- Ensure the new design is visually appealing and user-friendly
- Implement the updates quickly as it's an urgent task

Ideal Skills:
- Proficient in CSS and JavaScript
- Experience in responsive design
- Ability to work quickly and meet deadlines
- Good understanding of UI/UX principles