{
  "brand_name": "Your Brand",
  "colors": {
    "primary": "#007AFF",
    "secondary": "#5856D6", 
    "success": "#34C759",
    "warning": "#FF9500",
    "error": "#FF3B30",
    "neutral_100": "#FFFFFF",
    "neutral_200": "#F2F2F7",
    "neutral_300": "#C7C7CC",
    "neutral_800": "#1C1C1E",
    "neutral_900": "#000000"
  },
  "typography": {
    "heading_primary": {
      "font_family": "SF Pro Display",
      "font_weight": "700",
      "font_size": "32px",
      "line_height": "1.2"
    },
    "heading_secondary": {
      "font_family": "SF Pro Display", 
      "font_weight": "600",
      "font_size": "24px",
      "line_height": "1.25"
    },
    "body_large": {
      "font_family": "SF Pro Text",
      "font_weight": "400", 
      "font_size": "17px",
      "line_height": "1.4"
    },
    "body_regular": {
      "font_family": "SF Pro Text",
      "font_weight": "400",
      "font_size": "15px", 
      "line_height": "1.4"
    },
    "caption": {
      "font_family": "SF Pro Text",
      "font_weight": "400",
      "font_size": "12px",
      "line_height": "1.3"
    }
  },
  "spacing": {
    "xs": "4px",
    "sm": "8px",
    "md": "16px", 
    "lg": "24px",
    "xl": "32px",
    "2xl": "48px",
    "3xl": "64px"
  },
  "border_radius": {
    "none": "0px",
    "sm": "4px",
    "md": "8px",
    "lg": "12px",
    "xl": "16px",
    "full": "9999px"
  },
  "shadows": {
    "sm": "0 1px 2px rgba(0, 0, 0, 0.05)",
    "md": "0 4px 6px rgba(0, 0, 0, 0.1)", 
    "lg": "0 10px 15px rgba(0, 0, 0, 0.1)",
    "xl": "0 20px 25px rgba(0, 0, 0, 0.1)"
  },
  "accessibility": {
    "min_contrast_ratio": 4.5,
    "min_touch_target": "44px",
    "focus_indicator_color": "#007AFF",
    "focus_indicator_width": "3px"
  }
}