{
  "$description": "Sixtyfour brand design tokens. W3C DTCG format; colour, typography and radius are standard token groups. Logo files, clear-space geometry, minimum sizes and prohibited uses are under $extensions.\"ai.sixtyfour.brand\". Human guidelines: https://www.sixtyfour.ai/brand",
  "color": {
    "black": {
      "$type": "color",
      "$value": "#000000",
      "$description": "Maximum-contrast ink and full-bleed dark surfaces.",
      "$extensions": {
        "ai.sixtyfour.brand": {
          "cssVariable": "--sf-color-black",
          "label": "Black"
        }
      }
    },
    "ink": {
      "$type": "color",
      "$value": "#0A0A0A",
      "$description": "Primary text and the standard dark surface.",
      "$extensions": {
        "ai.sixtyfour.brand": {
          "cssVariable": "--sf-color-ink",
          "label": "Ink"
        }
      }
    },
    "body": {
      "$type": "color",
      "$value": "#555555",
      "$description": "Long-form body copy.",
      "$extensions": {
        "ai.sixtyfour.brand": {
          "cssVariable": "--sf-color-body",
          "label": "Body"
        }
      }
    },
    "muted": {
      "$type": "color",
      "$value": "#737373",
      "$description": "Secondary and supporting text.",
      "$extensions": {
        "ai.sixtyfour.brand": {
          "cssVariable": "--sf-color-muted",
          "label": "Muted"
        }
      }
    },
    "metadata": {
      "$type": "color",
      "$value": "#9A9A9A",
      "$description": "Timestamps, counts and de-emphasised labels.",
      "$extensions": {
        "ai.sixtyfour.brand": {
          "cssVariable": "--sf-color-metadata",
          "label": "Metadata"
        }
      }
    },
    "border": {
      "$type": "color",
      "$value": "#D4D4D4",
      "$description": "Hairlines, dividers and container borders.",
      "$extensions": {
        "ai.sixtyfour.brand": {
          "cssVariable": "--sf-color-border",
          "label": "Border"
        }
      }
    },
    "sunken": {
      "$type": "color",
      "$value": "#E0E0E0",
      "$description": "Recessed surfaces inside a card: media wells, code blocks, table headers.",
      "$extensions": {
        "ai.sixtyfour.brand": {
          "cssVariable": "--sf-color-sunken",
          "label": "Sunken"
        }
      }
    },
    "canvas": {
      "$type": "color",
      "$value": "#F5F5F5",
      "$description": "The page background.",
      "$extensions": {
        "ai.sixtyfour.brand": {
          "cssVariable": "--sf-color-canvas",
          "label": "Canvas"
        }
      }
    },
    "card": {
      "$type": "color",
      "$value": "#FCFCFC",
      "$description": "Raised surfaces on the canvas.",
      "$extensions": {
        "ai.sixtyfour.brand": {
          "cssVariable": "--sf-color-card",
          "label": "Card"
        }
      }
    },
    "white": {
      "$type": "color",
      "$value": "#FFFFFF",
      "$description": "Inputs, and ink on dark surfaces.",
      "$extensions": {
        "ai.sixtyfour.brand": {
          "cssVariable": "--sf-color-white",
          "label": "White"
        }
      }
    }
  },
  "typography": {
    "pageHeading": {
      "$type": "typography",
      "$value": {
        "fontFamily": "Geist",
        "fontWeight": 500,
        "fontSize": "52px",
        "lineHeight": "56px",
        "letterSpacing": "-1.56px"
      },
      "$description": "Page heading — Medium, 52/56, tracking -3%.",
      "$extensions": {
        "ai.sixtyfour.brand": {
          "label": "Page heading",
          "trackingPercent": -3
        }
      }
    },
    "sectionHeading": {
      "$type": "typography",
      "$value": {
        "fontFamily": "Geist",
        "fontWeight": 500,
        "fontSize": "33px",
        "lineHeight": "37px",
        "letterSpacing": "-0.825px"
      },
      "$description": "Section heading — Medium, 33/37, tracking -2.5%.",
      "$extensions": {
        "ai.sixtyfour.brand": {
          "label": "Section heading",
          "trackingPercent": -2.5
        }
      }
    },
    "subheading": {
      "$type": "typography",
      "$value": {
        "fontFamily": "Geist",
        "fontWeight": 500,
        "fontSize": "20px",
        "lineHeight": "26px",
        "letterSpacing": "-0.3px"
      },
      "$description": "Subheading — Medium, 20/26, tracking -1.5%.",
      "$extensions": {
        "ai.sixtyfour.brand": {
          "label": "Subheading",
          "trackingPercent": -1.5
        }
      }
    },
    "intro": {
      "$type": "typography",
      "$value": {
        "fontFamily": "Geist",
        "fontWeight": 400,
        "fontSize": "17px",
        "lineHeight": "28px",
        "letterSpacing": "0px"
      },
      "$description": "Intro — Regular, 17/28, tracking 0%.",
      "$extensions": {
        "ai.sixtyfour.brand": {
          "label": "Intro",
          "trackingPercent": 0
        }
      }
    },
    "body": {
      "$type": "typography",
      "$value": {
        "fontFamily": "Geist",
        "fontWeight": 400,
        "fontSize": "16px",
        "lineHeight": "27px",
        "letterSpacing": "0px"
      },
      "$description": "Body — Regular, 16/27, tracking 0%.",
      "$extensions": {
        "ai.sixtyfour.brand": {
          "label": "Body",
          "trackingPercent": 0
        }
      }
    },
    "metadata": {
      "$type": "typography",
      "$value": {
        "fontFamily": "Geist",
        "fontWeight": 400,
        "fontSize": "14px",
        "lineHeight": "20px",
        "letterSpacing": "0px"
      },
      "$description": "Metadata — Regular, 14/20, tracking 0%.",
      "$extensions": {
        "ai.sixtyfour.brand": {
          "label": "Metadata",
          "trackingPercent": 0
        }
      }
    },
    "eyebrow": {
      "$type": "typography",
      "$value": {
        "fontFamily": "Geist",
        "fontWeight": 500,
        "fontSize": "13px",
        "lineHeight": "18px",
        "letterSpacing": "-0.13px"
      },
      "$description": "Eyebrow — Medium, 13/18, tracking -1%.",
      "$extensions": {
        "ai.sixtyfour.brand": {
          "label": "Eyebrow",
          "trackingPercent": -1
        }
      }
    }
  },
  "radius": {
    "r4": {
      "$type": "dimension",
      "$value": "4px"
    },
    "r6": {
      "$type": "dimension",
      "$value": "6px"
    },
    "r7": {
      "$type": "dimension",
      "$value": "7px"
    },
    "r8": {
      "$type": "dimension",
      "$value": "8px"
    },
    "r12": {
      "$type": "dimension",
      "$value": "12px"
    },
    "r15": {
      "$type": "dimension",
      "$value": "15px"
    },
    "r16": {
      "$type": "dimension",
      "$value": "16px"
    },
    "r20": {
      "$type": "dimension",
      "$value": "20px"
    }
  },
  "$extensions": {
    "ai.sixtyfour.brand": {
      "organization": "Sixtyfour AI, Inc.",
      "guidelines": "https://www.sixtyfour.ai/brand",
      "font": {
        "family": "Geist",
        "cssStack": "\"Geist\", -apple-system, BlinkMacSystemFont, \"Segoe UI\", Arial, sans-serif",
        "weights": [
          400,
          500
        ],
        "source": "https://fonts.google.com/specimen/Geist",
        "constraint": "Regular (400) and Medium (500) only. No bold, no italic display styles, and no monospace family."
      },
      "logo": {
        "lockup": [
          {
            "id": "lockup-black",
            "name": "Lockup, black",
            "approvedBackground": "light",
            "guidance": "The default. Use on light, simple backgrounds.",
            "svg": {
              "url": "https://www.sixtyfour.ai/assets/brand/sixtyfour-lockup-black.svg",
              "bytes": 8652,
              "humanSize": "8.4 KB"
            },
            "png": {
              "url": "https://www.sixtyfour.ai/assets/brand/sixtyfour-lockup-black.png",
              "bytes": 30233,
              "humanSize": "30 KB"
            }
          },
          {
            "id": "lockup-inverse",
            "name": "Lockup, inverse",
            "approvedBackground": "dark",
            "guidance": "Use on dark backgrounds.",
            "svg": {
              "url": "https://www.sixtyfour.ai/assets/brand/sixtyfour-lockup-inverse.svg",
              "bytes": 8652,
              "humanSize": "8.4 KB"
            },
            "png": {
              "url": "https://www.sixtyfour.ai/assets/brand/sixtyfour-lockup-inverse.png",
              "bytes": 27717,
              "humanSize": "27 KB"
            }
          }
        ],
        "mark": [
          {
            "id": "mark-black",
            "name": "Mark, black",
            "approvedBackground": "light",
            "guidance": "Compact, already-identified contexts.",
            "svg": {
              "url": "https://www.sixtyfour.ai/assets/brand/sixtyfour-mark-black.svg",
              "bytes": 2955,
              "humanSize": "2.9 KB"
            },
            "png": {
              "url": "https://www.sixtyfour.ai/assets/brand/sixtyfour-mark-black.png",
              "bytes": 21998,
              "humanSize": "21 KB"
            }
          },
          {
            "id": "mark-inverse",
            "name": "Mark, inverse",
            "approvedBackground": "dark",
            "guidance": "Compact, on dark.",
            "svg": {
              "url": "https://www.sixtyfour.ai/assets/brand/sixtyfour-mark-inverse.svg",
              "bytes": 2955,
              "humanSize": "2.9 KB"
            },
            "png": {
              "url": "https://www.sixtyfour.ai/assets/brand/sixtyfour-mark-inverse.png",
              "bytes": 19807,
              "humanSize": "19 KB"
            }
          }
        ],
        "clearSpace": {
          "rule": "Keep at least 1X around every side. X equals the height of one visible cube face in the mark. Never let text, edges, or imagery enter this area.",
          "xAsFractionOfLockupWidth": 0.0313,
          "xAsFractionOfMarkHeight": 0.2492,
          "diagramExaggeration": 3.37,
          "diagramXAsFractionOfLockupWidth": 0.1055
        },
        "minimumSize": {
          "lockupWidthPx": 128,
          "markWidthPx": 32
        }
      },
      "rules": {
        "radius": "Container radius comes from the set above. Never 0 on a bordered or filled box, and never a fully rounded pill.",
        "case": "Sentence case throughout. No all-caps and no text-transform:uppercase.",
        "typography": "Regular (400) and Medium (500) only. No bold, no italic display styles, and no monospace family.",
        "accent": "There is no accent colour. The palette is nine neutrals."
      },
      "prohibited": [
        {
          "id": "stretch",
          "title": "Stretch or condense",
          "rule": "Scale proportionally. Never distort the lockup or mark."
        },
        {
          "id": "rotate",
          "title": "Rotate or redraw",
          "rule": "Do not rebuild the cubes, change perspective, or rotate the identity."
        },
        {
          "id": "recolorFaces",
          "title": "Recolor faces",
          "rule": "Use only the approved black and inverse artwork."
        },
        {
          "id": "effects",
          "title": "Add effects",
          "rule": "No shadows, glows, gradients, outlines, or containers added to the artwork."
        },
        {
          "id": "crop",
          "title": "Crop the artwork",
          "rule": "Keep the full clear-space area visible; do not clip the mark or wordmark."
        },
        {
          "id": "recolorOne",
          "title": "Recolor one element",
          "rule": "Use one approved color for the mark and name. Never recolor either alone."
        }
      ],
      "usage": "Do not modify the logo, imply endorsement, expose sensitive data, or use Sixtyfour assets in unlawful, deceptive, or invasive contexts. For an exception, contact the accountable Sixtyfour brand owner before publication."
    }
  }
}