# Invisible Details

> A course on the art of predictable interfaces — the invisible decisions that make interfaces feel intentional, safe and obvious.

A paid course ($145 one-time, lifetime access) for designers and engineers who care about interface quality. Two chapters: Notes (the ideas) and Practice (real UI components broken down decision by decision). Regional discounts apply automatically; team licences are available.

## Curriculum

- Foundation: Introduction, Learning to notice, Small details that add up, Predictability is a feature
- Designing Interface Behavior: Designing States, Feedback is a conversation, Forgiving Input, Interfaces should remember
- Interaction Feel & Usability: Speed is a feeling, The weight of a click, Designing for Keyboard
- Language & Complexity: Words shape expectations, WYSIWYG editor is hard
- Foundation: Introduction
- Basic UI Patterns: Stepper, Tree, Action modal
- Data Visualization: GitHub activity chart, Charts
- Input & Selection: Date picker

## Free preview

- [Learning to notice](https://invisibledetails.com/preview/learning-to-notice.md): free lesson, readable without an account
- [Small details that add up](https://invisibledetails.com/preview/small-details-that-add-up.md): free lesson, readable without an account
- [Stepper](https://invisibledetails.com/preview/stepper.md): free lesson, readable without an account

## Links

- [Homepage](https://invisibledetails.com/index.md): full course overview, pricing and FAQ
- [Team licences](https://invisibledetails.com/teams.md): volume pricing for teams
- [Changelog](https://invisibledetails.com/changelog.md): course updates and new lessons
- [Color picker playground](https://invisibledetails.com/playground/color-picker.md): an interactive color picker rebuilt from Paper (sRGB, Display P3, OKLCH)

## For agents

- Every page above is also available as markdown at the same URL with `.md` appended, or via `Accept: text/markdown`.
- [llms-full.txt](https://invisibledetails.com/llms-full.txt): the full public corpus (course overview + free lessons) in one file.

## Contact

- Author: Dmytro (https://x.com/pqoqubbw)
- Support: support@invisibledetails.com