See how quality compounds

Meet Northwind, the workspace you’ll improve across this course. It keeps a team’s work in sync. The signup card works, yet people hesitate: the headline promises nothing, the button says “Submit”, and the card snaps on in one frame.

Quality is a stack of small decisions pointing at one task, and the eye that makes them is trained, not innate.

Feel it accumulate

Northwind’s pricing card as the generator shipped it. Drag the slider to swap defaults for decisions.

No single swap is dramatic. Stacked, they compound into what users call quality.

Where the decisions come from

Six lenses, four on the surface:

• Typography: how text is set.
• Animation: motion that explains change.
• Craft: the visual system around a task, its spacing, colour, and edges.
• Copywriting: every word in the interface.

Beneath them sits product design: what the interface should do before it’s styled. Between behaviour and surface sits interaction: whether the task responds, recovers, and works for everyone. Perfect type on the wrong control is still wrong. The right control with no visible focus is still unusable.

The signup card’s headline and button, weak version first:

Every weakness has a name. “Welcome to Northwind!” greets instead of promising; “our product” hides what it is; “Submit” names a mechanic, “Start syncing free” names the outcome and the cost. The chrome is a tell too: the gradient headline and glowing pill are what a generator reaches for when the words say nothing. Name it and the fix writes itself.

Now toggle each surface lens and reread the card.

With everything on, each domain amplifies the rest. Split up only to study, never to ship.

Taste is trained

Karri Saarinen, head of design at Linear, says quality needs three things: the belief it matters, the skill to recognise it, and the willingness to care. Belief and willingness are choices. The skill trains by comparing versions. As Paul Graham puts it, “I think it’s easier to see ugliness than to imagine beauty.”

“The quality of any collaborative creative endeavour tends to approach the level of taste of whoever is in charge” (John Gruber). Brief AI tools or builders and you’re in charge, so your taste is the ceiling.

The road ahead

The course walks the domains in this order:

1. Train your eye (you are here)
2. Make text feel right
3. Make words earn their place
4. Make space and colour feel chosen
5. Decide what it does
6. Make every interaction feel considered
7. Use motion to explain change
8. Keep your taste with AI
9. Rebuild real screens
10. Design AI people trust (optional extension)

Recap

• Quality is many small decisions pointing at one task; none alone is the polish.
• Six lenses produce them: typography, animation, craft, and copywriting on the surface, product design underneath, interaction between them.
• Taste is trained, not innate: belief, willingness, and a skill built by comparing versions.

From memory: name the six lenses, and the three things Saarinen says quality needs.

Next, six side-by-side comparisons that train you to spot the weak version before you can explain it.