문제 4: 입력 폼 ⭐

<div class="flex flex-col gap-4">
  <h2 class="text-2xl font-bold">이름 입력</h2>
  <input type="text" placeholder="이름을 입력하세요" 
         class="border rounded-lg px-4 py-2">
  <input type="email" placeholder="이메일을 입력하세요"
         class="border rounded-lg px-4 py-2">
  <button class="bg-blue-500 text-white w-full">제출</button>
</div>