Apple HIG: New Liquid Glass Design Language + SF Symbols + Typography (iOS 26 Visual System)
Starting in iOS 26, Apple’s full new visual language Liquid Glass, plus deepened SF Symbols, typographic optical sizes, and color palette system. Liquid Glass: what it is (digital "meta-material", Lensing effect, gel-like flexibility) / material layers (specular highlights/shadows/internal glow feedback/focus changes) / two variants (Regular vs Clear plus three prerequisites for Clear) / adaptivity (small controls switch between light and dark, large panels only gray at edges, soft/hard scroll edges) / structure (depicting relationships, reflecting navigation focus, elevating controls, extending to edges) / geometric concentricity (three shapes: fixed/capsule/concentric) / legibility, Tinting, accessibility / Icon Composer icon workflow (single artwork → all platforms, six appearance modes, layered export). SF Symbols: 4 rendering modes (monochrome/hierarchical/palette/multicolor), variable color, 9 weights and 3 scales, variants, drawing animations (Draw On/Off, Magic Replace, Wiggle/Rotate/Breathe/Pulse/Bounce/Scale), interpolation principles, custom symbols. Typography: SF/NY/Compact/Mono, optical sizes SF Text/Display, variable fonts, 11 Dynamic Type text styles, tracking and leading, font selection (structure/contrast/display vs text fonts). Color palette: dual tint modes, grayscale fill/separator/system gray, semantic colors.