Good UI isn’t just about aesthetics.

Before your next design review, check two fundamentals:

01 — Spacing

Stop guessing spacing.

A consistent spacing system creates:

Rhythm → Hierarchy → Consistency → Scalability

A practical starting point:

4 → 8 → 12 → 16 → 24 → 32 → 48 → 64

Use these as starting points, not rigid rules.

The real question is whether your spacing communicates relationships and hierarchy. 

02 — Accessibility

Before you ship, check:

☐ Color contrast
☐ Focus states
☐ Keyboard navigation
☐ Touch target size
☐ Form labels
☐ Clear error messages
☐ Meaningful alt text
☐ Heading hierarchy
☐ Color isn’t the only signal
☐ Screen-reader considerations 

One important reminder:

Accessibility isn’t a final polish step. Build it into the design.

And don’t communicate meaning with color alone.

Use color + text + context so users have multiple ways to understand what’s happening. 

The takeaway

Good UI isn’t just:

“Does it look good?”

It’s also:

“Does it work for different people?”

Save this for your next design review.