Vague animation prompts fail Claude and ChatGPT, Zenn guide says

The Zenn article is written for people who use Claude or ChatGPT to build landing pages and keep getting motion they did not ask for. It traces the problem to the prompt itself: words like "nice" or "stylish" leave the AI to choose which element moves, which motion to use, how long it takes and how far it travels. The result, the guide says, is a uniformly flashy output rather than a targeted one.

The proposed fix is to name the motion in both Japanese and English, state where it goes, give speed and distance as numbers, and add a note that respects the OS reduced-motion setting. The guide presents this as a repeatable request pattern rather than a one-off trick, and it illustrates the pattern with six common web motions, each paired with a sample prompt and CSS. It also points readers to a separate reference site that lists 32 motions with live samples and adjustable sliders, so a user can settle on a numeric value by eye and copy the matching prompt.