
* 겪고 있는 문제 상황을 최대한 자세하게 작성해주세요.
* 문제 해결을 위해 어떤 시도를 해보았는지 구체적으로 함께 알려주세요.
div로 나눠서 올렸는데도 불구하고 하위항목처럼 표시가 됩니다.
탭 버튼 눌러서 맞췄는데 왜 이런 오류가 날까요?

1개의 div 일 때는 문제가 없습니다.

똑같이 복사 붙여넣기를 해서 만든 2개 그룹은 하위의 하위항목으로 표시가 됩니다.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet"
integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js"
integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM"
crossorigin="anonymous"></script>
<title>스파르타코딩클럽 | 부트스트랩 연습하기</title>
<style>
.mytitle {
background-color: green;
width: 100%;
height: 250px;
background-image: url("https://img.marieclairekorea.com/2022/04/mck_626780d804494.jpg");
background-size: cover;
background-position: center;
color: white;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
}
.mypost {
max-width: 500px;
width: 95%;
margin: 20px auto 0px auto;
box-shadow: 0px 0px 3px 0px grey;
padding: 20px;
}
.form-floating mb-3 {
height: 500px;
}
.mybtn {
margin-top: 10px;
}
.card {
max-width: 500px;
width: 95%;
margin: 20px auto 0px auto;
}
</style>
</head>
<body>
<div class="mytitle">
<h1>샤이니 온유 팬명록</h1>
</div>
<div class="mypost">
<div class="form-floating mb-3">
<input type="email" class="form-control" id="floatingInput" placeholder="name@example.com">
<label for="floatingInput">닉네임</label>
</div>
<div class="form-floating">
<textarea class="form-control" placeholder="Leave a comment here" id="floatingTextarea2"
style="height: 100px"></textarea>
<label for="floatingTextarea2">응원댓글</label>
</div>
<div class="mybtn">
<button type="button" class="btn btn-dark">응원 남기기</button>
</div>
</div>
<div class="card">
<div class="card-body">
<blockquote class="blockquote mb-0">
<p>새로운 앨범 너무 멋져요!</p>
<footer class="blockquote-footer">호빵맨
</footer>
</blockquote>
</div>
<div class="card">
<div class="card-body">
<blockquote class="blockquote mb-0">
<p>새로운 앨범 너무 멋져요!</p>
<footer class="blockquote-footer">호빵맨
</footer>
</blockquote>
</div>
<div class="card">
<div class="card-body">
<blockquote class="blockquote mb-0">
<p>새로운 앨범 너무 멋져요!</p>
<footer class="blockquote-footer">호빵맨
</footer>
</blockquote>
</div>
</body>
</html>
