//! App setup, state, layout and platform guides.
//!
//! Start with the [counter app](crate). These guides cover the next steps:
//!
//! - [Start an app](crate::_docs::getting_started): project structure and the first window.
//! - [State](crate::_docs::state): values, callbacks and effects across recomposition.
//! - [Layout](crate::_docs::layout): modifiers, containers and lazy lists.
//! - [Platforms](crate::_docs::platforms): platform features and host requirements.