Gap Sources

Font rendering: designed fonts may not exist on user devices. Solution: font-family fallback chain plus web fonts.

Image compression: design uses high-res PNGs, production uses compressed WebP. Solution: optimize format pipeline.

Browser compatibility: CSS behaves differently across browsers. Solution: Autoprefixer plus test on major browsers.

Design Review Process

Use browser DevTools overlay to compare pixel-by-pixel. One project found 47 differences (18 must-fix). After fixes, achieved 96%+ fidelity. The module that skipped review had 17 obvious issues reported by client post-launch.