what are the best practices in adopting liquid design

The main best practices for adopting Liquid Glass are:

Use it sparingly and intentionally
- Reserve Liquid Glass for the navigation layer and other key controls that float above content.
- Don’t make everything glassy—overusing it can muddy the hierarchy.
Avoid “glass on glass”
- Stacking Liquid Glass elements on top of each other can make the interface feel cluttered and confusing.
Keep content in the content layer
- Let Liquid Glass support the UI, but keep the actual app content visually separate so it stays clear and readable.
Establish hierarchy, harmony, and consistency
- Apple calls out these as the three guiding principles:
  1. Hierarchy: controls should feel like a distinct functional layer
  2. Harmony: your design should complement the system’s rhythm
  3. Consistency: use system patterns so the experience works across platforms and screen sizes
Adopt standard controls where possible
- If you have custom controls, consider whether standard UIKit/SwiftUI/AppKit controls already fit better with the new design.
Audit your app screen by screen
- Identify which views stand out, where background elements should be removed, and where custom UI needs refinement.
Use shapes and spacing thoughtfully
- Prefer the system’s recommended shapes, especially concentric shapes and fallback behavior when components appear both nested and standalone.
- Watch for corners that feel too pinched or flared.
Make interfaces adapt to context
- Liquid Glass should remain clear and legible across light/dark backgrounds, window sizes, focus changes, and accessibility settings.
Respect accessibility and legibility
- Avoid tinting everything.
- Avoid content intersecting with glass.
- Let system accessibility settings like reduced transparency, increased contrast, and reduced motion work automatically.

If you want, I can also summarize the best practices specifically for UIKit, SwiftUI, or designing custom elements.