Converting Figma designs to responsive HTML/CSS - where to begin?

I need to turn a Figma mockup into working HTML and CSS code. The design file only shows one breakpoint at 1440px width. I’m not sure what’s the right approach here.

Should I build the layout starting from the 1440px desktop version and then make it work on smaller screens? Or is it better to go mobile-first and work my way up to larger displays?

What techniques work best for making designs look good across different device sizes? Any tips for maintaining the design integrity while keeping it responsive would be helpful.

Both work, but I use a hybrid approach for single breakpoint designs. Start with the 1440px layout - nail down the structure and content hierarchy first. Build solid semantic HTML, then match the desktop CSS exactly as designed. Here’s what I’ve learned: figure out what actually needs redesigning vs. what just needs tweaking. Nav menus, sidebars, and complex grids? They need complete mobile overhauls. Content blocks, images, and text? They’ll usually scale down fine with good fluid techniques. Don’t go crazy with viewport units - stick to percentage widths with smart max-widths. Set up a spacing system early using CSS custom properties, then work your media queries down from 1440px. Test on real devices as you go, don’t wait till the end. Biggest mistake I see? Overthinking the responsive breakdowns. Focus on readability and usability - forget pixel-perfect recreation on smaller screens.

Mobile first is the way to go, even with just a desktop design. I’ve done this tons of times.

Break that 1440px design into smaller pieces. See how content could stack or reorganize on mobile. You can usually figure out the mobile layout by thinking about what’s most important.

CSS Grid and Flexbox handle most cases. Use rem for text and max-width with percentages for containers. Media queries at 768px and 1024px cover the main breakpoints.

Here’s what changed everything for me - I stopped doing this manually. Converting Figma to responsive code screams automation.

I built a workflow that pulls design tokens from Figma, generates base CSS, and creates responsive variations automatically. What used to take hours now takes minutes.

Automated pipelines handle conversion, optimization, and basic responsive adjustments. Way more reliable than hand coding every time.

You can build something similar with the right automation platform: https://latenode.com

Desktop-first works great when you’ve only got the 1440px design. I’ve done plenty of projects where clients give you just one breakpoint. Build the desktop layout exactly as shown, then use CSS clamp() for fluid text and container queries for responsive components. Way more predictable than trying to guess what mobile should look like. Don’t obsess over exact pixels - focus on keeping the visual hierarchy and spacing ratios intact. Set up CSS custom properties for consistent spacing and nail down your grid system early. Biggest thing I’ve learned: figure out what needs a complete redesign vs. what just needs scaling. Navigation and complex layouts usually need rethinking. Text blocks and simple cards? Just adjust the width. Test on real devices, not just dev tools. Actual viewports behave differently than browser simulation, especially for touch and text rendering.