# Causal Navbar — Section Design Reference

Schema: Design Details SECTION.md v3.2
Source: https://causal.so/
Website: Causal
Section ID: d00b2633-e220-4e95-8cfe-3c90917aced0
Design Details page: https://designdetails.io/sections/causal-so--home--navbar-d00b2633
Status: deterministic evidence captured; editorial AI review pending

## Purpose

This is a navbar section on the Home page. Use the attached crop and measured browser facts to reconstruct its composition. Do not infer unmeasured source values.

## Layout

1440×68px root; block

## Visual signature

minimal, geometric, corporate, ui-centric, spatial treatment at 1440×68px. The crop spans 0–68px of a 13069px page.

## Components

- FAQ Accordion
- Floating Product Card
- Footer
- Abstract UI Mockups
- Navigation Bar
- Hero
- Primary Button
- Feature Card
- Testimonial Card

## Evidence note

The geometry, typography, colors, media, and animation parameters below come from saved HTML/CSS/browser evidence when present. Website-level roles are supplied separately. Editorial section judgment remains pending unless the MCP resolves this source ID to a promoted canonical record.

## Build blueprint v3.2

### Purpose and classification

- Canonical type: navigation
- Source type: navbar
- Structure: 1440×68px root; block
- Layout: 1440×68px root; block
- Styles: minimal, geometric, corporate, ui-centric, spatial
- Components: FAQ Accordion, Floating Product Card, Footer, Abstract UI Mockups, Navigation Bar, Hero, Primary Button, Feature Card, Testimonial Card
- Purpose: navbar section from the Home page of Causal.
- Visual signature: rgba(0, 0, 0, 0) with 1440×68px root; block. Inspect the crop for image and content hierarchy.
- Place on the page: 1 of 12, before Hero (`causal-so:hero-expanding-mockup`)

### Crop and composition

- Crop: 1440×68px; aspect ratio 21.176:1
- Page bounds: 0–68px of 13069px
- Guidance: Preserve the documented hierarchy and relationships; exact measurements were not deterministically captured.

### Exact typography evidence

The sectionScale values were measured inside this crop. The siteRoles values explain how those faces function across the source website; they must not replace section measurements.

```json
{
  "sectionScale": [
    {
      "role": "action label",
      "family": "Manrope Variable",
      "stack": "\"Manrope Variable\", ui-sans-serif, system-ui, sans-serif",
      "size": "14px",
      "weight": "500",
      "lineHeight": "20px",
      "letterSpacing": "normal",
      "sample": "Home",
      "element": "a",
      "occurrences": 33,
      "sourceId": "font-14"
    },
    {
      "role": "UI/supporting text",
      "family": "Manrope Variable",
      "stack": "\"Manrope Variable\", ui-sans-serif, system-ui, sans-serif",
      "size": "14px",
      "weight": "600",
      "lineHeight": "20px",
      "letterSpacing": "normal",
      "sample": "Start for free",
      "element": "a",
      "occurrences": 1,
      "sourceId": "font-32"
    }
  ],
  "siteRoles": [
    {
      "role": "display",
      "size": "60px",
      "family": "Manrope Variable",
      "source": "computed",
      "traits": "Regular",
      "weight": "700",
      "evidence": "font-10: computed CSS at 1440×1000; AI role: Manrope Variable, 60px, weight 700. Used for the prominent Hero heading.",
      "sampleId": "font-10",
      "confidence": 0.95,
      "lineHeight": "72px",
      "letterSpacing": "normal"
    },
    {
      "role": "heading",
      "size": "50px",
      "family": "Manrope Variable",
      "source": "computed",
      "traits": "Regular",
      "weight": "650",
      "evidence": "font-7: computed CSS at 1440×1000; AI role: Manrope Variable, 50px, weight 650. Used for major section headings like 'Save ideas of all forms.'",
      "sampleId": "font-7",
      "confidence": 0.95,
      "lineHeight": "70px",
      "letterSpacing": "normal"
    },
    {
      "role": "body",
      "size": "16px",
      "family": "Inter Variable",
      "source": "computed",
      "traits": "Regular",
      "weight": "500",
      "evidence": "font-2: computed CSS at 1440×1000; AI role: Inter Variable, 16px, weight 500. Used for standard body copy and descriptive text within UI mockups.",
      "sampleId": "font-2",
      "confidence": 0.85,
      "lineHeight": "22.4px",
      "letterSpacing": "normal"
    }
  ]
}
```

### Exact color evidence

The section samples record where each computed value was used. Functional roles come from the website-level classifier and remain separate.

```json
{
  "sectionUsage": [
    {
      "value": "#F9F9F9",
      "cssValue": "rgb(249, 249, 249)",
      "alpha": 1,
      "appliedAs": [
        "background",
        "text",
        "svg-stroke"
      ],
      "occurrences": 32,
      "sourceId": "color-1"
    },
    {
      "value": "#878787",
      "cssValue": "rgb(135, 135, 135)",
      "alpha": 1,
      "appliedAs": [
        "text",
        "svg-stroke"
      ],
      "occurrences": 190,
      "sourceId": "color-3"
    },
    {
      "value": "#1A1A1A",
      "cssValue": "rgb(26, 26, 26)",
      "alpha": 1,
      "appliedAs": [
        "svg-fill",
        "text"
      ],
      "occurrences": 380,
      "sourceId": "color-4"
    },
    {
      "value": "#F9F9F9",
      "cssValue": "color(srgb 0.976471 0.976471 0.976471 / 0.8)",
      "alpha": 0.8,
      "appliedAs": [
        "background"
      ],
      "occurrences": 1,
      "sourceId": "color-13"
    }
  ],
  "functionalPalette": [
    {
      "hex": "#F9F9F9",
      "name": "canvas",
      "role": "canvas",
      "source": "computed",
      "evidence": "color-1: computed rgb(249, 249, 249); AI role: rgb(249, 249, 249) serves as the primary global background color for the page body.",
      "sampleId": "color-1",
      "confidence": 0.95
    },
    {
      "hex": "#1A1A1A",
      "name": "text",
      "role": "text",
      "source": "computed",
      "evidence": "color-4: computed rgb(26, 26, 26); AI role: rgb(26, 26, 26) is the dominant high-contrast color used for headings and primary copy.",
      "sampleId": "color-4",
      "confidence": 0.95
    },
    {
      "hex": "#878787",
      "name": "muted text",
      "role": "muted-text",
      "source": "computed",
      "evidence": "color-3: computed rgb(135, 135, 135); AI role: rgb(135, 135, 135) is used for secondary information, such as navigation links and less emphasized text.",
      "sampleId": "color-3",
      "confidence": 0.9
    },
    {
      "hex": "#EEEEEE",
      "name": "surface",
      "role": "surface",
      "source": "computed",
      "evidence": "color-2: computed rgb(238, 238, 238); AI role: rgb(238, 238, 238) and similar off-whites are used as background fills for feature and testimonial cards to differentiate them from the canvas.",
      "sampleId": "color-2",
      "confidence": 0.85
    },
    {
      "hex": "#000000",
      "name": "primary action",
      "role": "primary-action",
      "source": "computed",
      "evidence": "color-11: computed rgb(0, 0, 0); AI role: Solid black is used as the fill for primary Call To Action buttons.",
      "sampleId": "color-11",
      "confidence": 0.8
    }
  ]
}
```

### Design tokens

```json
{
  "radius": "Large border radii, resulting in pill-shaped buttons and soft-edged rectangular cards.",
  "density": "Low density. The layout prioritizes open space and clear isolation of individual visual concepts or text blocks.",
  "evidence": "Observations of the DOM/CSS values for colors and fonts, paired with visual inspection of the layout, spacing, and shape treatments in the provided screenshots.",
  "borderStyle": "Mostly borderless. Separation is achieved through subtle shifts in background lightness (e.g., #F9F9F9 canvas vs #F2F2F2 card surface) rather than drawn strokes.",
  "buttonStyle": "High-contrast, solid fill (black), pill-shaped containers with medium-weight sans-serif text centered inside.",
  "cornerStyle": "Prominently rounded corners. Soft transitions on virtually all contained elements, avoiding sharp right angles.",
  "contentWidth": "Textual content, like headings and paragraphs, is often centrally constrained to a narrow measure for readability, while visual UI assets are allowed to break out wider.",
  "spacingRhythm": "Generous vertical spacing between major sections, allowing the content to breathe. Margins and paddings follow a seemingly proportional scale, contributing to the minimal aesthetic."
}
```

### Reconstruction specification

This is the implementation contract for the captured desktop viewport. Prefer section-specific facts here over general website descriptions.

- Root: 1440×68px; block; padding {"top":"0px","right":"0px","bottom":"0px","left":"0px"}; gap normal; background rgba(0, 0, 0, 0); radius 0px.
- Observed gaps: 4, 32px.
- Representative content widths: 467px.
- Layout containers: 2; cards/surfaces: 0; media elements: 5; browser animations: 0.

#### Container, grid, and spacing

```json
{
  "viewport": {
    "width": 1440,
    "captureBounds": {
      "top": 0,
      "bottom": 68,
      "pageHeight": 13069
    }
  },
  "container": {
    "size": "1440×68px",
    "position": "x 0px, y 0px",
    "display": "block",
    "positionMode": "sticky",
    "padding": {
      "top": "0px",
      "right": "0px",
      "bottom": "0px",
      "left": "0px"
    },
    "margin": {
      "top": "0px",
      "right": "0px",
      "bottom": "0px",
      "left": "0px"
    },
    "gap": "normal",
    "columns": "not captured",
    "background": "rgba(0, 0, 0, 0)",
    "radius": "0px",
    "border": "0px solid rgb(26, 26, 26)",
    "shadow": "none",
    "overflow": "visible"
  },
  "spacing": {
    "observedGapsPx": [
      4,
      32
    ],
    "representativeContentWidthsPx": [
      467
    ]
  },
  "columns": [
    {
      "element": "nav · HomeSolutionsTemplatesPricingResourcesFoundersPlan the app before you build it. Flows, specs and the",
      "size": "1440×36px",
      "position": "x 0px, y 16px",
      "display": "flex",
      "template": "not captured",
      "direction": "row",
      "gap": "normal"
    },
    {
      "element": "ul · HomeSolutionsTemplatesPricingResources",
      "size": "467×36px",
      "position": "x 487px, y 16px",
      "display": "flex",
      "template": "not captured",
      "direction": "row",
      "gap": "normal 32px"
    }
  ]
}
```

#### Cards and surfaces

```json
{
  "cards": [],
  "surfaces": {
    "radii": [
      "100px"
    ],
    "borders": [],
    "shadows": []
  }
}
```

#### Media treatment

```json
[
  {
    "element": "svg · svg",
    "size": "22×24px",
    "position": "x 32px, y 22px",
    "aspectRatio": 0.9,
    "objectFit": "fill",
    "objectPosition": "50% 50%",
    "radius": "0px",
    "overflow": "hidden",
    "source": "source not captured"
  },
  {
    "element": "svg · svg",
    "size": "16×16px",
    "position": "x 1414px, y 26px",
    "aspectRatio": 1,
    "objectFit": "fill",
    "objectPosition": "50% 50%",
    "radius": "0px",
    "overflow": "hidden",
    "source": "source not captured"
  },
  {
    "element": "svg · svg",
    "size": "14×14px",
    "position": "x 624px, y 28px",
    "aspectRatio": 1,
    "objectFit": "fill",
    "objectPosition": "50% 50%",
    "radius": "0px",
    "overflow": "hidden",
    "source": "source not captured"
  },
  {
    "element": "svg · svg",
    "size": "14×14px",
    "position": "x 742px, y 28px",
    "aspectRatio": 1,
    "objectFit": "fill",
    "objectPosition": "50% 50%",
    "radius": "0px",
    "overflow": "hidden",
    "source": "source not captured"
  },
  {
    "element": "svg · svg",
    "size": "14×14px",
    "position": "x 939px, y 28px",
    "aspectRatio": 1,
    "objectFit": "fill",
    "objectPosition": "50% 50%",
    "radius": "0px",
    "overflow": "hidden",
    "source": "source not captured"
  }
]
```

#### Browser-exposed animation parameters

```json
[]
```

### Measured geometry, surfaces, media, and animation

These raw values come from the saved element map and computed styles. Empty arrays mean the fact was not captured; they are not permission to invent source values.

```json
{
  "schema": "little-details-section-measurements-v1",
  "source": "saved DOM/CSS element and animation maps",
  "capturedAt": "2026-10-10T06:10:13.748Z",
  "viewportWidth": 1440,
  "bounds": {
    "top": 0,
    "bottom": 68,
    "pageHeight": 13069
  },
  "root": {
    "id": "ld-2",
    "tag": "header",
    "role": null,
    "label": "HomeSolutionsTemplatesPricingResourcesFoundersPlan the app before you build it. Flows, specs and the",
    "rect": {
      "x": 0,
      "y": 0,
      "width": 1440,
      "height": 68
    },
    "display": "block",
    "position": "sticky",
    "padding": {
      "top": "0px",
      "right": "0px",
      "bottom": "0px",
      "left": "0px"
    },
    "margin": {
      "top": "0px",
      "right": "0px",
      "bottom": "0px",
      "left": "0px"
    },
    "gap": "normal",
    "columns": null,
    "background": "rgba(0, 0, 0, 0)",
    "radius": "0px",
    "border": "0px solid rgb(26, 26, 26)",
    "shadow": "none",
    "overflow": "visible"
  },
  "spacing": {
    "gapsPx": [
      4,
      32
    ],
    "representativeContentWidthsPx": [
      467
    ]
  },
  "columns": [
    {
      "id": "ld-5",
      "tag": "nav",
      "role": null,
      "label": "HomeSolutionsTemplatesPricingResourcesFoundersPlan the app before you build it. Flows, specs and the",
      "rect": {
        "x": 0,
        "y": 16,
        "width": 1440,
        "height": 36
      },
      "display": "flex",
      "columns": null,
      "direction": "row",
      "gap": "normal"
    },
    {
      "id": "ld-21",
      "tag": "ul",
      "role": null,
      "label": "HomeSolutionsTemplatesPricingResources",
      "rect": {
        "x": 487,
        "y": 16,
        "width": 467,
        "height": 36
      },
      "display": "flex",
      "columns": null,
      "direction": "row",
      "gap": "normal 32px"
    }
  ],
  "cards": [],
  "surfaces": {
    "radii": [
      "100px"
    ],
    "borders": [],
    "shadows": []
  },
  "media": [
    {
      "id": "ld-7",
      "tag": "svg",
      "role": "img",
      "label": "svg",
      "rect": {
        "x": 32,
        "y": 22,
        "width": 22,
        "height": 24
      },
      "aspectRatio": 0.9,
      "objectFit": "fill",
      "objectPosition": "50% 50%",
      "radius": "0px",
      "overflow": "hidden",
      "media": null
    },
    {
      "id": "ld-82",
      "tag": "svg",
      "role": null,
      "label": "svg",
      "rect": {
        "x": 1414,
        "y": 26,
        "width": 16,
        "height": 16
      },
      "aspectRatio": 1,
      "objectFit": "fill",
      "objectPosition": "50% 50%",
      "radius": "0px",
      "overflow": "hidden",
      "media": null
    },
    {
      "id": "ld-26",
      "tag": "svg",
      "role": null,
      "label": "svg",
      "rect": {
        "x": 624,
        "y": 28,
        "width": 14,
        "height": 14
      },
      "aspectRatio": 1,
      "objectFit": "fill",
      "objectPosition": "50% 50%",
      "radius": "0px",
      "overflow": "hidden",
      "media": null
    },
    {
      "id": "ld-30",
      "tag": "svg",
      "role": null,
      "label": "svg",
      "rect": {
        "x": 742,
        "y": 28,
        "width": 14,
        "height": 14
      },
      "aspectRatio": 1,
      "objectFit": "fill",
      "objectPosition": "50% 50%",
      "radius": "0px",
      "overflow": "hidden",
      "media": null
    },
    {
      "id": "ld-36",
      "tag": "svg",
      "role": null,
      "label": "svg",
      "rect": {
        "x": 939,
        "y": 28,
        "width": 14,
        "height": 14
      },
      "aspectRatio": 1,
      "objectFit": "fill",
      "objectPosition": "50% 50%",
      "radius": "0px",
      "overflow": "hidden",
      "media": null
    }
  ],
  "animations": [],
  "coverage": {
    "elementsInSection": 20,
    "cards": 0,
    "media": 5,
    "animations": 0
  },
  "limitations": [
    "Values describe the captured desktop viewport and may change at other breakpoints.",
    "Transforms, sticky layers, and virtualized content can make the inferred section root approximate.",
    "Animations include browser-exposed Web Animations API state; CSS or script motion that was inactive at capture time may be absent."
  ]
}
```

### Observed motion

No timestamped authored motion is attached. Use only restrained baseline transitions.

The browser animation records above are deterministic parameters captured from active browser animations. The timestamped observations describe what Gemini saw in the video. Treat them as complementary evidence. When either source is empty or they conflict, state the uncertainty instead of inventing timing or easing.

### Responsive contract

- Measured viewport: 1440px wide.
- Mobile/tablet values: not measured by this section evidence unless a separate capture is explicitly listed.
- Preserve hierarchy and sequence; collapse simultaneous columns only where needed, maintain media aspect ratios, and verify touch targets and text wrapping at target breakpoints.

### Structure versus visual skin

- Preserve: content hierarchy, layout relationships, section rhythm, interaction purpose.
- Adapt: brand colors, font family, copy, imagery, icons, decorative details.
- Rule: Preserve the observed design logic while creating original branding, copy, assets, and implementation details.

### Adaptation and dependencies

- Effort: Not assessed
- What transfers: Documented hierarchy and composition
- Dependencies: None recorded
- Guidance: Adapt the pattern to the new product and content.

### Evidence readiness

- Coverage: 7/7
- Can build: Yes
- Missing facts: timestamped authored motion
- Warning: Buildable with adaptations for these unsupported facts: timestamped authored motion.

### Agent implementation prompt

Create an original navigation section inspired by the design evidence titled “Causal Navbar”.

Purpose: navbar section from the Home page of Causal.

Structure: 1440×68px root; block. Source layout label: 1440×68px root; block. Preserve the documented hierarchy and relationships; exact measurements were not deterministically captured.

Visual signature to preserve at the pattern level: rgba(0, 0, 0, 0) with 1440×68px root; block. Inspect the crop for image and content hierarchy.

Components: FAQ Accordion, Floating Product Card, Footer, Abstract UI Mockups, Navigation Bar, Hero, Primary Button, Feature Card, Testimonial Card.

Style direction: minimal, geometric, corporate, ui-centric, spatial.

Observed crop: 1440×68px (21.176:1). Treat this as evidence of composition, not a mandatory output size.

Typography evidence: {"role":"display","size":"60px","family":"Manrope Variable","source":"computed","traits":"Regular","weight":"700","evidence":"font-10: computed CSS at 1440×1000; AI role: Manrope Variable, 60px, weight 700. Used for the prominent Hero heading.","sampleId":"font-10","confidence":0.95,"lineHeight":"72px","letterSpacing":"normal"} {"role":"heading","size":"50px","family":"Manrope Variable","source":"computed","traits":"Regular","weight":"650","evidence":"font-7: computed CSS at 1440×1000; AI role: Manrope Variable, 50px, weight 650. Used for major section headings like 'Save ideas of all forms.'","sampleId":"font-7","confidence":0.95,"lineHeight":"70px","letterSpacing":"normal"} {"role":"body","size":"16px","family":"Inter Variable","source":"computed","traits":"Regular","weight":"500","evidence":"font-2: computed CSS at 1440×1000; AI role: Inter Variable, 16px, weight 500. Used for standard body copy and descriptive text within UI mockups.","sampleId":"font-2","confidence":0.85,"lineHeight":"22.4px","letterSpacing":"normal"}

Color evidence: {"hex":"#F9F9F9","name":"canvas","role":"canvas","source":"computed","evidence":"color-1: computed rgb(249, 249, 249); AI role: rgb(249, 249, 249) serves as the primary global background color for the page body.","sampleId":"color-1","confidence":0.95} {"hex":"#1A1A1A","name":"text","role":"text","source":"computed","evidence":"color-4: computed rgb(26, 26, 26); AI role: rgb(26, 26, 26) is the dominant high-contrast color used for headings and primary copy.","sampleId":"color-4","confidence":0.95} {"hex":"#878787","name":"muted text","role":"muted-text","source":"computed","evidence":"color-3: computed rgb(135, 135, 135); AI role: rgb(135, 135, 135) is used for secondary information, such as navigation links and less emphasized text.","sampleId":"color-3","confidence":0.9} {"hex":"#EEEEEE","name":"surface","role":"surface","source":"computed","evidence":"color-2: computed rgb(238, 238, 238); AI role: rgb(238, 238, 238) and similar off-whites are used as background fills for feature and testimonial cards to differentiate them from the canvas.","sampleId":"color-2","confidence":0.85} {"hex":"#000000","name":"primary action","role":"primary-action","source":"computed","evidence":"color-11: computed rgb(0, 0, 0); AI role: Solid black is used as the fill for primary Call To Action buttons.","sampleId":"color-11","confidence":0.8}

Typography measured inside this section: {"id":"font-14","family":"Manrope Variable","fontStack":"\"Manrope Variable\", ui-sans-serif, system-ui, sans-serif","weight":"500","size":"14px","lineHeight":"20px","letterSpacing":"normal","traits":"Regular","count":33,"contexts":[{"tag":"a","text":"Home","top":25,"property":"font"},{"tag":"button","text":"Solutions","top":25,"property":"font"},{"tag":"button","text":"Templates","top":25,"property":"font"}]} {"id":"font-32","family":"Manrope Variable","fontStack":"\"Manrope Variable\", ui-sans-serif, system-ui, sans-serif","weight":"600","size":"14px","lineHeight":"20px","letterSpacing":"normal","traits":"Regular","count":1,"contexts":[{"tag":"a","text":"Start for free","top":16,"property":"font"}]}

Colors measured inside this section: {"id":"color-1","hex":"#F9F9F9","alpha":1,"cssValue":"rgb(249, 249, 249)","count":32,"contexts":[{"tag":"body","text":"HomeSolutionsTemplatesPricingResourcesFoundersPlan the app before you build it. Flows, specs and the","top":0,"property":"background"},{"tag":"a","text":"Start for free","top":16,"property":"text"},{"tag":"path","text":"","top":30,"property":"svg-stroke"}]} {"id":"color-3","hex":"#878787","alpha":1,"cssValue":"rgb(135, 135, 135)","count":190,"contexts":[{"tag":"button","text":"Solutions","top":25,"property":"text"},{"tag":"path","text":"","top":33,"property":"svg-stroke"},{"tag":"a","text":"Pricing","top":25,"property":"text"}]} {"id":"color-4","hex":"#1A1A1A","alpha":1,"cssValue":"rgb(26, 26, 26)","count":380,"contexts":[{"tag":"svg","text":"","top":22,"property":"svg-fill"},{"tag":"path","text":"","top":26,"property":"svg-fill"},{"tag":"a","text":"Home","top":25,"property":"text"}]} {"id":"color-13","hex":"#F9F9F9","alpha":0.8,"cssValue":"color(srgb 0.976471 0.976471 0.976471 / 0.8)","count":1,"contexts":[{"tag":"div","text":"","top":0,"property":"background"}]}

Exact section measurements from the saved element map: root {"rect":{"x":0,"y":0,"width":1440,"height":68},"padding":{"top":"0px","right":"0px","bottom":"0px","left":"0px"},"gap":"normal","columns":null,"overflow":"visible"}; spacing {"gapsPx":[4,32],"representativeContentWidthsPx":[467]}; surfaces {"radii":["100px"],"borders":[],"shadows":[]}; media [{"tag":"svg","rect":{"x":32,"y":22,"width":22,"height":24},"aspectRatio":0.9,"objectFit":"fill","objectPosition":"50% 50%","radius":"0px"},{"tag":"svg","rect":{"x":1414,"y":26,"width":16,"height":16},"aspectRatio":1,"objectFit":"fill","objectPosition":"50% 50%","radius":"0px"},{"tag":"svg","rect":{"x":624,"y":28,"width":14,"height":14},"aspectRatio":1,"objectFit":"fill","objectPosition":"50% 50%","radius":"0px"},{"tag":"svg","rect":{"x":742,"y":28,"width":14,"height":14},"aspectRatio":1,"objectFit":"fill","objectPosition":"50% 50%","radius":"0px"}]

Do not invent signature motion. Use only restrained baseline transitions if the product needs them.

Transfer the documented hierarchy and composition rather than source copy or assets.

No explicit dependencies were recorded.

Adapt the pattern to the new product and content.

Use new copy, imagery, branding, and implementation details. Do not reproduce the source website or its proprietary assets.