Read the rules, not just the screen
A design file is more than colored boxes. Repeated spacing, alignment and heading relationships reveal a system. Identify those recurring decisions before coding rather than inventing new measurements for each component.
Shared variables for colors, spacing, radii and type sizes make changes manageable. A shared value should still reflect genuine repetition or an explicit design rule.
Let behavior define components
Two visually similar areas do not always belong in the same component. Shared behavior, data shape and change frequency matter too. An abstraction created only to save a few lines may accumulate more conditions over time.
Start with a clear implementation. Extract components when meaningful repetition appears. A component’s purpose should be easier to explain than its list of parameters.
Make missing states visible
The ideal screen does not show every product state. Long headings, missing images, empty lists, slow responses and errors need attention. Focus, hover and disabled states are also part of the design.
Where is focus when navigating with a keyboard? Which control receives it after a dialog closes? These details are invisible in a screenshot but central to usability.
Validate with real content
A visual review without real content is incomplete. Try different heading lengths and language characters. On narrow screens, columns should become a meaningful sequence rather than simply shrink.
Compare the implementation and design at the same viewport width, then test the flow at other widths. The goal is to preserve design decisions across conditions, not just reproduce one image.