Responsive Example

This example shows breakpoint layers and how they resolve through Style::at_breakpoint(...).

• File: examples/04_responsive.rs
• Run:

cargo run --example responsive

• Expected output: one line per breakpoint showing the resolved width, height, padding, and shadow values.

Why this exists: responsive behavior should be inspectable without launching a GUI backend. The example also uses the more discoverable at_md/at_2xl builder aliases.