143 lines
5.6 KiB
Markdown
143 lines
5.6 KiB
Markdown
# Design System: Coinbase
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> **Hermes Agent — Implementation Notes**
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>
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> The original site uses proprietary fonts. For self-contained HTML output, use these CDN substitutes:
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> - **Primary:** `DM Sans` | **Mono:** `system monospace stack`
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> - **Font stack (CSS):** `font-family: 'DM Sans', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;`
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> - **Mono stack (CSS):** `font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;`
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> ```html
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> <link href="https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,100..1000;1,9..40,100..1000&display=swap" rel="stylesheet">
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> ```
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> Use `write_file` to create HTML, serve via `generative-widgets` skill (cloudflared tunnel).
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> Verify visual accuracy with `browser_vision` after generating.
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## 1. Visual Theme & Atmosphere
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Coinbase's website is a clean, trustworthy crypto platform that communicates financial reliability through a blue-and-white binary palette. The design uses Coinbase Blue (`#0052ff`) — a deep, saturated blue — as the singular brand accent against white and near-black surfaces. The proprietary font family includes CoinbaseDisplay for hero headlines, CoinbaseSans for UI text, CoinbaseText for body reading, and CoinbaseIcons for iconography — a comprehensive four-font system.
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The button system uses a distinctive 56px radius for pill-shaped CTAs with hover transitions to a lighter blue (`#578bfa`). The design alternates between white content sections and dark (`#0a0b0d`, `#282b31`) feature sections, creating a professional, financial-grade interface.
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**Key Characteristics:**
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- Coinbase Blue (`#0052ff`) as singular brand accent
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- Four-font proprietary family: Display, Sans, Text, Icons
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- 56px radius pill buttons with blue hover transition
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- Near-black (`#0a0b0d`) dark sections + white light sections
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- 1.00 line-height on display headings — ultra-tight
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- Cool gray secondary surface (`#eef0f3`) with blue tint
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- `text-transform: lowercase` on some button labels — unusual
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## 2. Color Palette & Roles
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### Primary
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- **Coinbase Blue** (`#0052ff`): Primary brand, links, CTA borders
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- **Pure White** (`#ffffff`): Primary light surface
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- **Near Black** (`#0a0b0d`): Text, dark section backgrounds
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- **Cool Gray Surface** (`#eef0f3`): Secondary button background
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### Interactive
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- **Hover Blue** (`#578bfa`): Button hover background
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- **Link Blue** (`#0667d0`): Secondary link color
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- **Muted Blue** (`#5b616e`): Border color at 20% opacity
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### Surface
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- **Dark Card** (`#282b31`): Dark button/card backgrounds
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- **Light Surface** (`rgba(247,247,247,0.88)`): Subtle surface
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## 3. Typography Rules
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### Font Families
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- **Display**: `CoinbaseDisplay` — hero headlines
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- **UI / Sans**: `CoinbaseSans` — buttons, headings, nav
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- **Body**: `CoinbaseText` — reading text
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- **Icons**: `CoinbaseIcons` — icon font
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### Hierarchy
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| Role | Font | Size | Weight | Line Height | Notes |
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|------|------|------|--------|-------------|-------|
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| Display Hero | CoinbaseDisplay | 80px | 400 | 1.00 (tight) | Maximum impact |
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| Display Secondary | CoinbaseDisplay | 64px | 400 | 1.00 | Sub-hero |
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| Display Third | CoinbaseDisplay | 52px | 400 | 1.00 | Third tier |
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| Section Heading | CoinbaseSans | 36px | 400 | 1.11 (tight) | Feature sections |
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| Card Title | CoinbaseSans | 32px | 400 | 1.13 | Card headings |
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| Feature Title | CoinbaseSans | 18px | 600 | 1.33 | Feature emphasis |
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| Body Bold | CoinbaseSans | 16px | 700 | 1.50 | Strong body |
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| Body Semibold | CoinbaseSans | 16px | 600 | 1.25 | Buttons, nav |
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| Body | CoinbaseText | 18px | 400 | 1.56 | Standard reading |
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| Body Small | CoinbaseText | 16px | 400 | 1.50 | Secondary reading |
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| Button | CoinbaseSans | 16px | 600 | 1.20 | +0.16px tracking |
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| Caption | CoinbaseSans | 14px | 600–700 | 1.50 | Metadata |
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| Small | CoinbaseSans | 13px | 600 | 1.23 | Tags |
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## 4. Component Stylings
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### Buttons
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**Primary Pill (56px radius)**
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- Background: `#eef0f3` or `#282b31`
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- Radius: 56px
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- Border: `1px solid` matching background
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- Hover: `#578bfa` (light blue)
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- Focus: `2px solid black` outline
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**Full Pill (100000px radius)**
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- Used for maximum pill shape
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**Blue Bordered**
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- Border: `1px solid #0052ff`
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- Background: transparent
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### Cards & Containers
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- Radius: 8px–40px range
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- Borders: `1px solid rgba(91,97,110,0.2)`
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## 5. Layout Principles
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### Spacing System
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- Base: 8px
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- Scale: 1px, 3px, 4px, 5px, 6px, 8px, 10px, 12px, 15px, 16px, 20px, 24px, 25px, 32px, 48px
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### Border Radius Scale
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- Small (4px–8px): Article links, small cards
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- Standard (12px–16px): Cards, menus
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- Large (24px–32px): Feature containers
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- XL (40px): Large buttons/containers
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- Pill (56px): Primary CTAs
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- Full (100000px): Maximum pill
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## 6. Depth & Elevation
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Minimal shadow system — depth from color contrast between dark/light sections.
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## 7. Do's and Don'ts
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### Do
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- Use Coinbase Blue (#0052ff) for primary interactive elements
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- Apply 56px radius for all CTA buttons
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- Use CoinbaseDisplay for hero headings only
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- Alternate dark (#0a0b0d) and white sections
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### Don't
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- Don't use the blue decoratively — it's functional only
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- Don't use sharp corners on CTAs — 56px minimum
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## 8. Responsive Behavior
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Breakpoints: 400px, 576px, 640px, 768px, 896px, 1280px, 1440px, 1600px
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## 9. Agent Prompt Guide
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### Quick Color Reference
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- Brand: Coinbase Blue (`#0052ff`)
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- Background: White (`#ffffff`)
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- Dark surface: `#0a0b0d`
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- Secondary surface: `#eef0f3`
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- Hover: `#578bfa`
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- Text: `#0a0b0d`
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### Example Component Prompts
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- "Create hero: white background. CoinbaseDisplay 80px, line-height 1.00. Pill CTA (#eef0f3, 56px radius). Hover: #578bfa."
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- "Build dark section: #0a0b0d background. CoinbaseDisplay 64px white text. Blue accent link (#0052ff)."
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