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Syntax - Tasty Web Development Treats

994: AI Sucks At CSS

Syntax - Tasty Web Development Treats

Wes Bos

Tech News, Technology, News

4.91.2K Ratings

🗓️ 8 April 2026

⏱️ 60 minutes

🧾️ Download transcript

Summary

In this potluck episode of Syntax, Wes and Scott answer your questions about AI struggles with CSS and design workflows, learning vs relying on AI, debugging web performance, beginner soldering setups, navigating AI-era job interviews, Figma dev mode, modern API choices, and more. Show Notes 00:00 Welcome to Syntax! 00:55 Why AI struggles with CSS and design workflows 10:50 How much AI should you use when learning to code? 18:41 Debugging performance: tools and team workflows Ep 585: Fundamentals × What Makes a Website Slow? Ep 874: Fast Apps - Easy Perf Wins Ep 897: Making Your App Feel Faster Than It Really Is Ep 972: These Things Make Your App Feel Like Crap on Mobile 23:52 Brought to you by Sentry.io 26:26 Beginner soldering setup and essential tools 29:54 Preparing for interviews without AI (while jobs require it) Brendan Falk on AI-native coding interviews 35:16 Thoughts on Figma dev mode and design workflows 39:20 Ice vs Thaw menu bar apps 40:27 Why AI isn’t pushing us toward better APIs 44:54 Vibe rules, skills, and shipping docs for agents vibe-rules Optimizing Content for Agents 54:44 Sick Picks + Shameless Plugs Sick Picks Scott: Jury Duty Wes: USB Cable Tester Shameless Plugs Syntax YouTube Channel Hit us up on Socials! Syntax: X Instagram Tiktok LinkedIn Threads Wes: X Instagram Tiktok LinkedIn Threads Scott: X Instagram Tiktok LinkedIn Threads Randy: X Instagram YouTube Threads

Transcript

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0:00.0

Welcome to Syntax today. We got a pot-lock episode. That's where you bring the questions. We bring

0:04.3

the answers. I've got some really good questions today. Why does AI suck so much at CSS? How are we

0:09.5

supposed to get good, clean, repeatable design out of using an LLM? So questions around vibe rules,

0:16.4

skills versus rules versus agents. Should these rules be shipped with a package or should you just

0:22.3

reach out to the internet to grab them? Interviewing with AI, a genius, genius use of using a

0:29.4

dumb model from Brendan Falk. We're going to describe his thoughts on that, which I thought it was so,

0:36.1

so genius. How to define and debug performance

0:39.3

issues in your application. There's so many different spots where your app can start to feel

0:43.4

slow. And then finally, question from someone says, why isn't software getting better and faster

0:49.0

with AI? Isn't that what we were promised? Let's get into it. What's up, Scott? You want to hit us with the first

0:54.8

question? Yeah, first question from Yergan. Do you have any workflow suggestions for design and

1:01.9

CSS when working with AI agenetic coding? I'm currently experimenting with open spec plus

1:09.5

clod code and targeted system prompts for roles,

1:12.9

and it's great at functionality, but the design looks terrible.

1:17.4

I have started a new experiment with new system prompts for UX design

1:22.3

and opinionated front-end dev persona, but I'm wondering how other people are tackling this.

1:29.1

Is CSS without a rigid design system just too difficult for LLMs?

1:34.3

I will say this, Juergen, even with a rigid design system, AI sucks at CSS.

1:43.2

It's a perfect storm, if you will, of things that AI does poorly.

1:48.0

AI loves to just solve a problem locally instead of solving a problem globally.

1:55.4

It just likes to patch and throw things in there even when you explicitly tell it not to.

2:00.1

And with CSS, that often means just throwing just a bunch of bloated additional one-off

...

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