bug: fix mobile layout on small screens

[diiabblo]

Description

UI elements overlap on mobile devices with screen width < 375px.

Affected Components

• Question cards overflow
• Navigation menu cut off
• Wallet button overlaps text
• Footer links stacked incorrectly

Steps to Reproduce

1. Open app on iPhone SE or similar
2. Navigate to game page
3. Observe layout issues

Expected Behavior

Responsive layout adapts to all screen sizes.

Possible Solution

Review and fix media queries for smallest breakpoints.