Increase desktop content width

[grantknaver]

Estimate: 1.5 hours

Description:

• Expand the main content container width on desktop to reduce unused whitespace.
• Adjust padding to keep text readable and not overly stretched.
• Confirm responsive behavior remains clean on tablet and mobile.

Why this matters:

Right now, half the screen feels empty, and the hero content looks cramped on larger displays. A wider layout improves balance, readability, and the perceived quality of the site.