Apple Liquid Glass design system — comprehensive design philosophy, implementation guide, and technical API reference from WWDC 2025. Covers design principles (iOS-native glass hierarchy, restraint over spectacle), implementation patterns (Regular vs Clear variants, SwiftUI glassEffect API, scroll e
Apple Liquid Glass design system — comprehensive design philosophy, implementation guide, and technical API reference from WWDC 2025. Covers design principles (iOS-native glass hierarchy, restraint over spectacle), implementation patterns (Regular vs Clear variants, SwiftUI glassEffect API, scroll edge effects, tinting), platform adaptation (iOS 26+, iPadOS 26+, macOS Tahoe+, visionOS 3+), accessi