The Perfect Design Handoff: A Developer's Guide

Most "pixel-perfect" issues aren't coding errors; they are interpretation errors. When a design file is ambiguous, the developer has to guess. And we are terrible guessers.

1. Use a Grid System (Please!)

Web development is governed by rules, usually the CSS Box Model.

• Stick to a consistent spacing system (e.g., 8pt grid). If one margin is 23px and another is 25px, I will assume it's a mistake and standardize it to 24px (1.5rem).
• Define container widths clearly (e.g., 1280px, 1440px).

2. Assets: Exportable vs. CSS

Help me keep the site fast.

• SVGs: Icons and logos should be vectors, not PNGs.
• Photos: Prepare standard aspect ratios (16:9, 4:3) so clients can easily replace them later.
• Shadows & Gradients: Don't flatten them into images. Keep them as layer styles so I can copy the CSS values.

3. Responsive States

Sending just a Desktop view is like sending half a blueprint.

I don't need a mockup for every single device width, but I do need:

• Desktop (1440px): The main view.
• Mobile (375px/390px): How the menu works, how columns stack.
• Tablet (Example): Only if the layout changes drastically.

4. Hover & Interaction States

What happens when I hover over that button? Does it turn blue? Does it lift up?

Create a "UI Kit" page in Figma with all your buttons, form inputs (active, error, success states), and typography styles. It acts as the single source of truth.