I want you to act as a web developer and please write some code for me to create a responsive grid layout for a website.

I want you to act as a web developer and please write some code for me to create a responsive grid layout for a website.
Each grid item is a card with a rounded border (border-radius: 12px) and a subtle shadow (box-shadow), creating a sense of “floating.”
The card’s interior features: a full-width image, a title, a brief description, and a functional button.