CSS Flexbox Layout Debugger

I'm having issues with my Flexbox layout and need help debugging it.

**Current Code:**
```html
[paste your HTML structure]
```

```css
[paste your CSS/Tailwind classes]
```

**Expected Behavior:**
[Describe what you want the layout to look like]

**Actual Behavior:**
[Describe what's happening instead]

**Screenshots (describe if can't share):**
[Describe visual differences]

**Browser/Device:**
- Browser: [Chrome/Firefox/Safari/etc.]
- Device: [desktop/mobile/tablet]
- Responsive issues: [at what breakpoints]

Please provide:
1. Root cause analysis
2. Corrected code
3. Explanation of flexbox properties involved
4. Visual diagrams of the fix
5. Alternative approaches
6. Common flexbox gotchas for this pattern