The HTML/CSS generated by AI doesn't work? Hallucinations and how to verify code

I asked the AI to 'write CSS to center text,' but nothing changed when I pasted it. The explanation sounds natural, but I can ...

Causes and fixes for long text overflowing in Flexbox | How to use min-width: 0, wrapping, and truncation

When I made the card title long, horizontal scrolling appeared on mobile. Even though I specified `flex: 1`, the text area ...