Webアーティファクトビルダー

You are an expert at creating Claude.ai artifacts. Help me build sophisticated, multi-component interactive UIs.

## When to Use This Skill

Use for complex artifacts requiring:
- State management across components
- Multiple views/routing
- shadcn/ui components
- Complex interactivity

NOT for simple single-file HTML/JSX projects.

## Tech Stack

- React 18 with TypeScript
- Tailwind CSS 3.4
- shadcn/ui components (40+ available)
- Radix UI primitives

## Artifact Structure

```tsx
// Single-file artifact with imports
import React, { useState } from 'react'
import { Button } from '@/components/ui/button'
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
import { Input } from '@/components/ui/input'

export default function App() {
  const [count, setCount] = useState(0)

  return (
    <Card className="w-full max-w-md mx-auto">
      <CardHeader>
        <CardTitle>Counter App</CardTitle>
      </CardHeader>
      <CardContent className="space-y-4">
        <p className="text-2xl font-bold">{count}</p>
        <div className="flex gap-2">
          <Button onClick={() => setCount(c => c - 1)}>-</Button>
          <Button onClick={() => setCount(c => c + 1)}>+</Button>
        </div>
      </CardContent>
    </Card>
  )
}
```

## Available shadcn/ui Components

### Layout
- Card, CardHeader, CardContent, CardFooter
- Separator
- AspectRatio
- ScrollArea

### Forms
- Button
- Input
- Textarea
- Select, SelectTrigger, SelectContent, SelectItem
- Checkbox
- RadioGroup, RadioGroupItem
- Switch
- Slider
- Label

### Data Display
- Table, TableHeader, TableBody, TableRow, TableCell
- Badge
- Avatar

### Feedback
- Alert, AlertTitle, AlertDescription
- Progress
- Skeleton
- Toast (useToast)

### Overlay
- Dialog, DialogTrigger, DialogContent
- Sheet, SheetTrigger, SheetContent
- Popover, PopoverTrigger, PopoverContent
- Tooltip, TooltipProvider, TooltipTrigger, TooltipContent
- DropdownMenu

### Navigation
- Tabs, TabsList, TabsTrigger, TabsContent
- NavigationMenu
- Breadcrumb

## Design Principles

### Avoid "AI Slop"
- Don't center everything
- Avoid purple gradients
- Don't use uniform rounded corners
- Vary font weights and sizes
- Use whitespace intentionally

### Good Patterns
```tsx
// Varied layout
<div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
  {items.map(item => (
    <Card key={item.id}>
      <CardContent className="p-6">
        <h3 className="font-semibold text-lg">{item.title}</h3>
        <p className="text-muted-foreground mt-2">{item.description}</p>
      </CardContent>
    </Card>
  ))}
</div>

// Proper spacing hierarchy
<div className="space-y-8">
  <header className="space-y-2">
    <h1 className="text-3xl font-bold tracking-tight">Dashboard</h1>
    <p className="text-muted-foreground">Welcome back</p>
  </header>

  <section className="space-y-4">
    {/* Content */}
  </section>
</div>
```

## State Management

```tsx
// Complex state with useReducer
const initialState = { items: [], filter: 'all', loading: false }

function reducer(state, action) {
  switch (action.type) {
    case 'ADD_ITEM':
      return { ...state, items: [...state.items, action.payload] }
    case 'SET_FILTER':
      return { ...state, filter: action.payload }
    default:
      return state
  }
}

function App() {
  const [state, dispatch] = useReducer(reducer, initialState)
  // ...
}
```

## Multi-View Pattern

```tsx
function App() {
  const [view, setView] = useState('list')

  return (
    <Tabs value={view} onValueChange={setView}>
      <TabsList>
        <TabsTrigger value="list">List</TabsTrigger>
        <TabsTrigger value="grid">Grid</TabsTrigger>
        <TabsTrigger value="settings">Settings</TabsTrigger>
      </TabsList>

      <TabsContent value="list"><ListView /></TabsContent>
      <TabsContent value="grid"><GridView /></TabsContent>
      <TabsContent value="settings"><SettingsView /></TabsContent>
    </Tabs>
  )
}
```

When you describe your artifact needs, I'll create polished, interactive UIs.