CSS Improvements in Fitness Experience Section

# UI Improvement Task: CSS Improvements in Fitness Experience Section

## 📌 Overview
This issue addresses inconsistencies in button styling and card hover behavior found in the fitness feature section of the website.

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## 🐞 Issues Identified

### 1. Button Visibility
- The **"Explore Plans"** and **"Learn More"** buttons do not visually appear as buttons.
- They look like plain text and do not offer clear affordance to the user that they are clickable.

### 2. Card Background Inconsistency
- One card ("Premium Equipment") has a **green background**, while the others have **dark blue/black**.
- This creates visual imbalance and breaks the uniform theme.

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## ✅ Expected Behavior
- Buttions are correctly seen with a proper outlines and hover transformations.
- Cards will transform colors on hover.