# IGNY8 Design Guide

> **🔒 MANDATORY** - All frontend code MUST follow these standards  
> **Version:** 1.8.3  
> **Last Updated:** January 20, 2026

---

## Quick Reference

| Need | Use | Import From |
|------|-----|-------------|
| Button | `<Button>` | `components/ui/button/Button` |
| Icon button | `<IconButton>` | `components/ui/button/IconButton` |
| Text input | `<InputField>` | `components/form/input/InputField` |
| Dropdown | `<Select>` | `components/form/Select` |
| Checkbox | `<Checkbox>` | `components/form/input/Checkbox` |
| Toggle | `<Switch>` | `components/form/switch/Switch` |
| Status label | `<Badge>` | `components/ui/badge/Badge` |
| Card | `<Card>` | `components/ui/card/Card` |
| Modal | `<Modal>` | `components/ui/modal` |
| Toast | `useToast()` | `components/ui/toast/ToastContainer` |
| Table | `<Table>` | `components/tables/Table` |

**Full component docs:** [docs/30-FRONTEND/COMPONENT-SYSTEM.md](docs/30-FRONTEND/COMPONENT-SYSTEM.md)

---

## 🎨 Color System

### Only 6 Base Colors (No Exceptions!)

| Token | Hex | Usage |
|-------|-----|-------|
| `brand` | #0077B6 | Primary actions, links |
| `success` | #2CA18E | Success states |
| `warning` | #D9A12C | Warnings, alerts |
| `danger/error` | #A12C40 | Errors, destructive |
| `purple` | #2C40A1 | Premium features |
| `gray` | #667085 | Text, borders, neutrals |

### Tailwind Classes

```tsx
// ✅ CORRECT - Use semantic colors
<div className="bg-brand-500 text-white">Primary</div>
<div className="bg-success-100 text-success-700">Success</div>
<div className="bg-error-100 text-error-700">Error</div>
<div className="text-gray-700 bg-gray-50">Neutral</div>

// ❌ WRONG - Default Tailwind colors are DISABLED
<div className="bg-blue-500">...</div>      // Will not work
<div className="bg-red-500">...</div>       // Will not work
<div className="bg-[#ff0000]">...</div>     // Hardcoded - forbidden
```

---

## Component Rules

### Rule 1: NEVER Use Raw HTML Elements

```tsx
// ❌ NEVER
<button onClick={...}>Click</button>
<input type="text" />
<select>...</select>
<textarea></textarea>

// ✅ ALWAYS
<Button onClick={...}>Click</Button>
<InputField type="text" label="Name" />
<Select options={options} />
<TextArea rows={4} />
```

### Rule 2: Icons from Central Location Only

```tsx
// ❌ NEVER
import { XIcon } from '@heroicons/react/24/outline';
import { Trash } from 'lucide-react';

// ✅ ALWAYS
import { CloseIcon, TrashBinIcon } from '../../icons';
```

### Rule 3: Consistent Icon Sizing

```tsx
// In buttons/badges
<Icon className="w-4 h-4" />

// Standalone
<Icon className="w-5 h-5" />

// Headers/large
<Icon className="w-6 h-6" />
```

---

## Button Variants

```tsx
// Primary action (main CTA)
<Button variant="primary">Save Changes</Button>

// Secondary action
<Button variant="secondary">Cancel</Button>

// Danger/destructive
<Button variant="danger">Delete</Button>

// Outline style
<Button variant="outline">Learn More</Button>

// Ghost (minimal)
<Button variant="ghost">Skip</Button>

// With icon
<Button variant="primary" leftIcon={<PlusIcon />}>Add Item</Button>

// Icon only
<IconButton icon={<SettingsIcon />} aria-label="Settings" />
```

---

## Form Patterns

### Input Fields

```tsx
<InputField
  label="Email"
  type="email"
  placeholder="you@example.com"
  error={errors.email}
  required
/>
```

### Select Dropdowns

```tsx
<Select
  label="Country"
  options={[
    { value: 'us', label: 'United States' },
    { value: 'uk', label: 'United Kingdom' },
  ]}
  value={country}
  onChange={setCountry}
/>
```

### Checkboxes & Switches

```tsx
// Checkbox
<Checkbox
  label="I agree to terms"
  checked={agreed}
  onChange={setAgreed}
/>

// Toggle switch
<Switch
  label="Enable notifications"
  checked={enabled}
  onChange={setEnabled}
/>
```

---

## Badge Tones

```tsx
<Badge tone="default">Draft</Badge>
<Badge tone="success">Active</Badge>
<Badge tone="warning">Pending</Badge>
<Badge tone="error">Failed</Badge>
<Badge tone="info">New</Badge>
```

---

## Modal Pattern

```tsx
const [isOpen, setIsOpen] = useState(false);

<Modal
  isOpen={isOpen}
  onClose={() => setIsOpen(false)}
  title="Confirm Delete"
>
  <p>Are you sure you want to delete this item?</p>
  <div className="flex gap-3 mt-4">
    <Button variant="secondary" onClick={() => setIsOpen(false)}>
      Cancel
    </Button>
    <Button variant="danger" onClick={handleDelete}>
      Delete
    </Button>
  </div>
</Modal>
```

---

## Toast Notifications

```tsx
import { useToast } from '../components/ui/toast/ToastContainer';

const { showToast } = useToast();

// Success
showToast('Changes saved successfully', 'success');

// Error
showToast('Failed to save changes', 'error');

// Warning
showToast('Your session is about to expire', 'warning');

// Info
showToast('New features available', 'info');
```

---

## Spacing & Layout

### Standard Spacing Scale

| Class | Size | Usage |
|-------|------|-------|
| `gap-2` | 8px | Tight grouping |
| `gap-3` | 12px | Default spacing |
| `gap-4` | 16px | Section spacing |
| `gap-6` | 24px | Major sections |

### Card Layout

```tsx
<Card>
  <Card.Header>
    <h3>Title</h3>
  </Card.Header>
  <Card.Body>
    Content here
  </Card.Body>
  <Card.Footer>
    <Button>Action</Button>
  </Card.Footer>
</Card>
```

---

## Typography

```tsx
// Page titles
<h1 className="text-2xl font-semibold text-gray-900">Page Title</h1>

// Section headers
<h2 className="text-lg font-medium text-gray-900">Section</h2>

// Card titles
<h3 className="text-base font-medium text-gray-900">Card Title</h3>

// Body text
<p className="text-sm text-gray-700">Body content</p>

// Secondary/muted text
<span className="text-sm text-gray-500">Helper text</span>
```

---

## ESLint Enforcement

These rules are **enforced via ESLint**:

| Rule | Level | Enforces |
|------|-------|----------|
| `no-raw-button` | warn | Use `<Button>` component |
| `no-raw-input` | warn | Use `<InputField>` component |
| `no-raw-select` | warn | Use `<Select>` component |
| `no-raw-textarea` | warn | Use `<TextArea>` component |
| `design-system-colors` | error | Only semantic colors |
| `no-hardcoded-colors` | error | No hex codes in className |

---

## Live Demo

Visit `/ui-elements` in the app to see all components in action.

---

## Related Docs

- [COMPONENT-SYSTEM.md](docs/30-FRONTEND/COMPONENT-SYSTEM.md) - Full component API
- [DESIGN-TOKENS.md](docs/30-FRONTEND/DESIGN-TOKENS.md) - CSS variables
- [PAGES.md](docs/30-FRONTEND/PAGES.md) - Route structure