feat(quiz): scaffold Next.js app and build coffee personality quiz

- Bootstrap Next.js 15 project with TypeScript, Tailwind, and App Router
- Build full quiz with 5 pop culture questions mapping to 3 personalities
- Implement percentage-based results display with ranked breakdown
- Apply warm/cozy earthy palette inspired by Claude homepage aesthetic
- Components: QuizQuestion, QuizResults with hover states and progress bar

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cc4e-course/quiz-project/README.md

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+This is a [Next.js](https://nextjs.org) project bootstrapped with [`create-next-app`](https://nextjs.org/docs/app/api-reference/cli/create-next-app).
+
+## Getting Started
+
+First, run the development server:
+
+```bash
+npm run dev
+# or
+yarn dev
+# or
+pnpm dev
+# or
+bun dev
+```
+
+Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+
+You can start editing the page by modifying `app/page.tsx`. The page auto-updates as you edit the file.
+
+This project uses [`next/font`](https://nextjs.org/docs/app/building-your-application/optimizing/fonts) to automatically optimize and load [Geist](https://vercel.com/font), a new font family for Vercel.
+
+## Learn More
+
+To learn more about Next.js, take a look at the following resources:
+
+- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
+- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+
+You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js) - your feedback and contributions are welcome!
+
+## Deploy on Vercel
+
+The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+
+Check out our [Next.js deployment documentation](https://nextjs.org/docs/app/building-your-application/deploying) for more details.

cc4e-course/quiz-project/app/components/QuizQuestion.tsx

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+type Option = {
+  text: string;
+  personality: 'zen' | 'nightOwl' | 'socialButterfly';
+};
+
+type Props = {
+  question: string;
+  options: Option[];
+  current: number;
+  total: number;
+  onSelect: (personality: Option['personality']) => void;
+};
+
+export default function QuizQuestion({ question, options, current, total, onSelect }: Props) {
+  return (
+    <div style={{
+      background: 'var(--card)',
+      borderRadius: '20px',
+      padding: '48px 44px',
+      boxShadow: '0 4px 24px rgba(61, 43, 26, 0.08)',
+      border: '1px solid var(--border)',
+      maxWidth: '520px',
+      width: '100%',
+    }}>
+      {/* Progress */}
+      <div style={{ marginBottom: '32px' }}>
+        <div style={{
+          display: 'flex',
+          justifyContent: 'space-between',
+          alignItems: 'center',
+          marginBottom: '10px',
+        }}>
+          <span style={{ fontSize: '12px', letterSpacing: '1.5px', textTransform: 'uppercase', color: 'var(--muted)', fontWeight: 600 }}>
+            Your Coffee Personality
+          </span>
+          <span style={{ fontSize: '13px', color: 'var(--muted)' }}>
+            {current} of {total}
+          </span>
+        </div>
+        <div style={{ height: '3px', background: 'var(--border)', borderRadius: '99px', overflow: 'hidden' }}>
+          <div style={{
+            height: '100%',
+            width: `${(current / total) * 100}%`,
+            background: 'linear-gradient(90deg, var(--accent), #a0785a)',
+            borderRadius: '99px',
+            transition: 'width 0.4s ease',
+          }} />
+        </div>
+      </div>
+
+      {/* Question */}
+      <h2 style={{
+        fontSize: '22px',
+        fontWeight: 500,
+        lineHeight: 1.4,
+        color: 'var(--foreground)',
+        marginBottom: '28px',
+      }}>
+        {question}
+      </h2>
+
+      {/* Options */}
+      <div style={{ display: 'flex', flexDirection: 'column', gap: '10px' }}>
+        {options.map((option, i) => (
+          <button
+            key={i}
+            onClick={() => onSelect(option.personality)}
+            style={{
+              border: '1.5px solid var(--border)',
+              borderRadius: '12px',
+              padding: '16px 20px',
+              textAlign: 'left',
+              fontSize: '15px',
+              color: 'var(--foreground)',
+              background: 'transparent',
+              cursor: 'pointer',
+              transition: 'all 0.18s ease',
+              width: '100%',
+              fontFamily: 'inherit',
+            }}
+            onMouseEnter={e => {
+              (e.currentTarget as HTMLButtonElement).style.borderColor = 'var(--accent)';
+              (e.currentTarget as HTMLButtonElement).style.background = 'var(--accent-light)';
+            }}
+            onMouseLeave={e => {
+              (e.currentTarget as HTMLButtonElement).style.borderColor = 'var(--border)';
+              (e.currentTarget as HTMLButtonElement).style.background = 'transparent';
+            }}
+          >
+            {option.text}
+          </button>
+        ))}
+      </div>
+    </div>
+  );
+}

cc4e-course/quiz-project/app/components/QuizResults.tsx

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+type PersonalityKey = 'zen' | 'nightOwl' | 'socialButterfly';
+
+type Scores = Record<PersonalityKey, number>;
+
+type Props = {
+  scores: Scores;
+  onReset: () => void;
+};
+
+const personalities: Record<PersonalityKey, { name: string; coffee: string; tagline: string }> = {
+  zen: {
+    name: 'Zen Minimalist',
+    coffee: 'Black Coffee, Single Origin',
+    tagline: 'Simple. Clean. Perfect.',
+  },
+  nightOwl: {
+    name: 'Night Owl',
+    coffee: 'Red Eye',
+    tagline: 'Sleep is optional.',
+  },
+  socialButterfly: {
+    name: 'Social Butterfly',
+    coffee: 'Cappuccino',
+    tagline: 'Coffee is better with company.',
+  },
+};
+
+export default function QuizResults({ scores, onReset }: Props) {
+  const total = Object.values(scores).reduce((a, b) => a + b, 0);
+
+  const ranked = (Object.keys(scores) as PersonalityKey[])
+    .map(key => ({
+      key,
+      count: scores[key],
+      pct: Math.round((scores[key] / total) * 100),
+      ...personalities[key],
+    }))
+    .sort((a, b) => b.count - a.count);
+
+  const top = ranked[0];
+
+  return (
+    <div style={{
+      background: 'var(--card)',
+      borderRadius: '20px',
+      padding: '48px 44px',
+      boxShadow: '0 4px 24px rgba(61, 43, 26, 0.08)',
+      border: '1px solid var(--border)',
+      maxWidth: '520px',
+      width: '100%',
+    }}>
+      <span style={{
+        fontSize: '12px',
+        letterSpacing: '1.5px',
+        textTransform: 'uppercase',
+        color: 'var(--muted)',
+        fontWeight: 600,
+      }}>
+        Your Result
+      </span>
+
+      {/* Top result */}
+      <div style={{
+        margin: '20px 0 36px',
+        padding: '28px',
+        background: 'var(--accent-light)',
+        border: '1.5px solid var(--accent)',
+        borderRadius: '16px',
+      }}>
+        <div style={{ fontSize: '13px', color: 'var(--muted)', marginBottom: '6px', fontWeight: 500 }}>
+          You&apos;re a
+        </div>
+        <h2 style={{ fontSize: '28px', fontWeight: 600, color: 'var(--foreground)', marginBottom: '4px', lineHeight: 1.2 }}>
+          {top.name}
+        </h2>
+        <div style={{ fontSize: '15px', color: 'var(--accent)', fontWeight: 500, marginBottom: '14px' }}>
+          {top.pct}% match
+        </div>
+        <div style={{ borderTop: '1px solid var(--border)', paddingTop: '14px' }}>
+          <div style={{ fontSize: '13px', color: 'var(--muted)', marginBottom: '2px' }}>Your coffee</div>
+          <div style={{ fontSize: '16px', fontWeight: 500, color: 'var(--foreground)', marginBottom: '4px' }}>
+            {top.coffee}
+          </div>
+          <div style={{ fontSize: '14px', color: 'var(--muted)', fontStyle: 'italic' }}>
+            &ldquo;{top.tagline}&rdquo;
+          </div>
+        </div>
+      </div>
+
+      {/* All results */}
+      <div style={{ marginBottom: '32px' }}>
+        <div style={{ fontSize: '13px', color: 'var(--muted)', fontWeight: 600, marginBottom: '16px', letterSpacing: '0.5px' }}>
+          Full breakdown
+        </div>
+        <div style={{ display: 'flex', flexDirection: 'column', gap: '16px' }}>
+          {ranked.map((p, i) => (
+            <div key={p.key}>
+              <div style={{ display: 'flex', justifyContent: 'space-between', marginBottom: '6px' }}>
+                <div>
+                  <span style={{ fontSize: '14px', fontWeight: 500, color: 'var(--foreground)' }}>{p.name}</span>
+                  <span style={{ fontSize: '13px', color: 'var(--muted)', marginLeft: '8px' }}>— {p.coffee}</span>
+                </div>
+                <span style={{ fontSize: '14px', fontWeight: 600, color: i === 0 ? 'var(--accent)' : 'var(--muted)' }}>
+                  {p.pct}%
+                </span>
+              </div>
+              <div style={{ height: '4px', background: 'var(--border)', borderRadius: '99px', overflow: 'hidden' }}>
+                <div style={{
+                  height: '100%',
+                  width: `${p.pct}%`,
+                  background: i === 0 ? 'linear-gradient(90deg, var(--accent), #a0785a)' : 'var(--border)',
+                  borderRadius: '99px',
+                  transition: 'width 0.6s ease',
+                  opacity: i === 0 ? 1 : 0.5,
+                }} />
+              </div>
+            </div>
+          ))}
+        </div>
+      </div>
+
+      <button
+        onClick={onReset}
+        style={{
+          width: '100%',
+          padding: '14px',
+          border: '1.5px solid var(--border)',
+          borderRadius: '12px',
+          background: 'transparent',
+          fontSize: '15px',
+          color: 'var(--muted)',
+          cursor: 'pointer',
+          fontFamily: 'inherit',
+          transition: 'all 0.18s ease',
+        }}
+        onMouseEnter={e => {
+          (e.currentTarget as HTMLButtonElement).style.borderColor = 'var(--accent)';
+          (e.currentTarget as HTMLButtonElement).style.color = 'var(--foreground)';
+        }}
+        onMouseLeave={e => {
+          (e.currentTarget as HTMLButtonElement).style.borderColor = 'var(--border)';
+          (e.currentTarget as HTMLButtonElement).style.color = 'var(--muted)';
+        }}
+      >
+        Take it again
+      </button>
+    </div>
+  );
+}

cc4e-course/quiz-project/app/globals.css

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+@import "tailwindcss";
+
+:root {
+  --background: #faf8f4;
+  --foreground: #3d2b1a;
+  --card: #fffdf8;
+  --accent: #c8956a;
+  --accent-light: rgba(200, 149, 106, 0.1);
+  --muted: #a0785a;
+  --border: #e8d9c8;
+}
+
+@theme inline {
+  --color-background: var(--background);
+  --color-foreground: var(--foreground);
+  --font-sans: var(--font-geist-sans);
+  --font-mono: var(--font-geist-mono);
+}
+
+body {
+  background: var(--background);
+  color: var(--foreground);
+  font-family: var(--font-geist-sans), Arial, Helvetica, sans-serif;
+}

cc4e-course/quiz-project/app/layout.tsx

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+import type { Metadata } from "next";
+import { Geist, Geist_Mono } from "next/font/google";
+import "./globals.css";
+
+const geistSans = Geist({
+  variable: "--font-geist-sans",
+  subsets: ["latin"],
+});
+
+const geistMono = Geist_Mono({
+  variable: "--font-geist-mono",
+  subsets: ["latin"],
+});
+
+export const metadata: Metadata = {
+  title: "Coffee Personality Quiz | Basecamp Coffee",
+  description: "Discover your coffee personality and find your perfect Basecamp Coffee drink.",
+};
+
+export default function RootLayout({
+  children,
+}: Readonly<{
+  children: React.ReactNode;
+}>) {
+  return (
+    <html lang="en">
+      <body
+        className={`${geistSans.variable} ${geistMono.variable} antialiased`}
+      >
+        {children}
+      </body>
+    </html>
+  );
+}

cc4e-course/quiz-project/app/page.tsx

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+'use client';
+
+import { useState } from 'react';
+import QuizQuestion from './components/QuizQuestion';
+import QuizResults from './components/QuizResults';
+
+type PersonalityKey = 'zen' | 'nightOwl' | 'socialButterfly';
+type Stage = 'intro' | 'quiz' | 'results';
+
+const questions = [
+  {
+    question: 'Pick a Netflix genre for tonight:',
+    options: [
+      { text: 'A dark, quiet thriller with no jump scares', personality: 'zen' as PersonalityKey },
+      { text: "A binge-worthy series you'll watch until 3am", personality: 'nightOwl' as PersonalityKey },
+      { text: 'Whatever your group chat is hyped about', personality: 'socialButterfly' as PersonalityKey },
+    ],
+  },
+  {
+    question: 'Your Hogwarts common room vibe:',
+    options: [
+      { text: 'Ravenclaw — books, focus, solitude', personality: 'zen' as PersonalityKey },
+      { text: 'Slytherin — ambition, late nights, no rules', personality: 'nightOwl' as PersonalityKey },
+      { text: "Hufflepuff — warm, inclusive, everyone's welcome", personality: 'socialButterfly' as PersonalityKey },
+    ],
+  },
+  {
+    question: "You're at a party. Where are you?",
+    options: [
+      { text: 'Stepped outside for some quiet', personality: 'zen' as PersonalityKey },
+      { text: 'Still there at 2am helping close the place down', personality: 'nightOwl' as PersonalityKey },
+      { text: 'Center of the room, introducing people to each other', personality: 'socialButterfly' as PersonalityKey },
+    ],
+  },
+  {
+    question: 'Your ideal travel style:',
+    options: [
+      { text: 'Solo trip, minimal itinerary, just vibes', personality: 'zen' as PersonalityKey },
+      { text: 'Red-eye flight to maximize time at the destination', personality: 'nightOwl' as PersonalityKey },
+      { text: 'Group trip, shared Airbnb, chaotic and perfect', personality: 'socialButterfly' as PersonalityKey },
+    ],
+  },
+  {
+    question: 'Pick a superpower:',
+    options: [
+      { text: 'Total mental clarity, always focused', personality: 'zen' as PersonalityKey },
+      { text: 'Never need sleep', personality: 'nightOwl' as PersonalityKey },
+      { text: 'Everyone immediately likes you', personality: 'socialButterfly' as PersonalityKey },
+    ],
+  },
+];
+
+const initialScores: Record<PersonalityKey, number> = { zen: 0, nightOwl: 0, socialButterfly: 0 };
+
+export default function Home() {
+  const [stage, setStage] = useState<Stage>('intro');
+  const [currentQ, setCurrentQ] = useState(0);
+  const [scores, setScores] = useState({ ...initialScores });
+
+  function handleAnswer(personality: PersonalityKey) {
+    const newScores = { ...scores, [personality]: scores[personality] + 1 };
+    setScores(newScores);
+
+    if (currentQ < questions.length - 1) {
+      setCurrentQ(currentQ + 1);
+    } else {
+      setStage('results');
+    }
+  }
+
+  function handleReset() {
+    setStage('intro');
+    setCurrentQ(0);
+    setScores({ ...initialScores });
+  }
+
+  return (
+    <div style={{
+      minHeight: '100vh',
+      background: 'linear-gradient(160deg, #faf8f4 0%, #f0e8dc 100%)',
+      display: 'flex',
+      flexDirection: 'column',
+      alignItems: 'center',
+      justifyContent: 'center',
+      padding: '32px 20px',
+    }}>
+      <div style={{ marginBottom: '40px', textAlign: 'center' }}>
+        <div style={{
+          fontSize: '13px',
+          letterSpacing: '2px',
+          textTransform: 'uppercase',
+          color: 'var(--muted)',
+          fontWeight: 600,
+        }}>
+          Basecamp Coffee
+        </div>
+      </div>
+
+      {stage === 'intro' && (
+        <div style={{
+          background: 'var(--card)',
+          borderRadius: '20px',
+          padding: '56px 44px',
+          boxShadow: '0 4px 24px rgba(61, 43, 26, 0.08)',
+          border: '1px solid var(--border)',
+          maxWidth: '520px',
+          width: '100%',
+          textAlign: 'center',
+        }}>
+          <div style={{
+            fontSize: '13px',
+            letterSpacing: '1.5px',
+            textTransform: 'uppercase',
+            color: 'var(--muted)',
+            fontWeight: 600,
+            marginBottom: '20px',
+          }}>
+            Discover your coffee identity
+          </div>
+          <h1 style={{
+            fontSize: '34px',
+            fontWeight: 600,
+            color: 'var(--foreground)',
+            lineHeight: 1.2,
+            marginBottom: '16px',
+          }}>
+            What&apos;s your coffee personality?
+          </h1>
+          <p style={{
+            fontSize: '16px',
+            color: 'var(--muted)',
+            lineHeight: 1.6,
+            marginBottom: '40px',
+          }}>
+            5 quick questions. We&apos;ll match you with your perfect Basecamp Coffee drink.
+          </p>
+          <button
+            onClick={() => setStage('quiz')}
+            style={{
+              background: 'var(--accent)',
+              color: 'white',
+              border: 'none',
+              borderRadius: '12px',
+              padding: '16px 40px',
+              fontSize: '16px',
+              fontWeight: 500,
+              cursor: 'pointer',
+              fontFamily: 'inherit',
+              transition: 'opacity 0.18s ease',
+              width: '100%',
+            }}
+            onMouseEnter={e => { (e.currentTarget as HTMLButtonElement).style.opacity = '0.88'; }}
+            onMouseLeave={e => { (e.currentTarget as HTMLButtonElement).style.opacity = '1'; }}
+          >
+            Find my coffee →
+          </button>
+        </div>
+      )}
+
+      {stage === 'quiz' && (
+        <QuizQuestion
+          question={questions[currentQ].question}
+          options={questions[currentQ].options}
+          current={currentQ + 1}
+          total={questions.length}
+          onSelect={handleAnswer}
+        />
+      )}
+
+      {stage === 'results' && (
+        <QuizResults scores={scores} onReset={handleReset} />
+      )}
+    </div>
+  );
+}

cc4e-course/quiz-project/eslint.config.mjs

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+import { defineConfig, globalIgnores } from "eslint/config";
+import nextVitals from "eslint-config-next/core-web-vitals";
+import nextTs from "eslint-config-next/typescript";
+
+const eslintConfig = defineConfig([
+  ...nextVitals,
+  ...nextTs,
+  // Override default ignores of eslint-config-next.
+  globalIgnores([
+    // Default ignores of eslint-config-next:
+    ".next/**",
+    "out/**",
+    "build/**",
+    "next-env.d.ts",
+  ]),
+]);
+
+export default eslintConfig;

cc4e-course/quiz-project/next-env.d.ts

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+/// <reference types="next" />
+/// <reference types="next/image-types/global" />
+import "./.next/dev/types/routes.d.ts";
+
+// NOTE: This file should not be edited
+// see https://nextjs.org/docs/app/api-reference/config/typescript for more information.

cc4e-course/quiz-project/next.config.ts

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+import type { NextConfig } from "next";
+
+const nextConfig: NextConfig = {
+  /* config options here */
+};
+
+export default nextConfig;

cc4e-course/quiz-project/package.json

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+{
+  "name": "quiz-app",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "eslint"
+  },
+  "dependencies": {
+    "next": "16.1.6",
+    "react": "19.2.3",
+    "react-dom": "19.2.3"
+  },
+  "devDependencies": {
+    "@tailwindcss/postcss": "^4",
+    "@types/node": "^20",
+    "@types/react": "^19",
+    "@types/react-dom": "^19",
+    "eslint": "^9",
+    "eslint-config-next": "16.1.6",
+    "tailwindcss": "^4",
+    "typescript": "^5"
+  }
+}

cc4e-course/quiz-project/postcss.config.mjs

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+const config = {
+  plugins: {
+    "@tailwindcss/postcss": {},
+  },
+};
+
+export default config;

cc4e-course/quiz-project/public/file.svg

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cc4e-course/quiz-project/public/globe.svg

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cc4e-course/quiz-project/tsconfig.json

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+  "compilerOptions": {
+    "target": "ES2017",
+    "lib": ["dom", "dom.iterable", "esnext"],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "strict": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "jsx": "react-jsx",
+    "incremental": true,
+    "plugins": [
+      {
+        "name": "next"
+      }
+    ],
+    "paths": {
+      "@/*": ["./*"]
+    }
+  },
+  "include": [
+    "next-env.d.ts",
+    "**/*.ts",
+    "**/*.tsx",
+    ".next/types/**/*.ts",
+    ".next/dev/types/**/*.ts",
+    "**/*.mts"
+  ],
+  "exclude": ["node_modules"]
+}