
입력 상자를 오른쪽으로 보내고 싶어도 안됩니다.
기존에는 가능했는데 무엇이 문제 인가요?

<!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: 95%;
height: 300px;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
color: white;
background-image: url("http://www.sangjomagazine.com/imgdata/sangjomagazine_com/201811/2018111017584296.jpg");
}
.mypost {
width: 95%;
max-width: 500px;
margin: 20px auto 20px auto;
box-shadow: 0px 0px 3px 0px black;
padding: 20px;
}
.mypost > button {
margin-top: 15px;
display: flex;
flex-direction: row;
justify-content: right;
}
.mycards {
width: 95%;
max-width: 500px;
margin: 20px auto 20px auto;
}
.card {
margin-top: 10px;
}
</style>
</head>
<body>
<h1 class="mytitle">이한상 방명록</h1>
<div class="mypost">
<div class="form-floating mb-3">
<input type="email" class="form-control" id="nickname" placeholder="닉네임을 입력하세요">
<label for="nickname">이름을 입력하세요</label>
</div>
<div class="form-floating">
<textarea class="form-control" placeholder="Leave a comment here" id="comments"></textarea>
<label for="comments">응원메세지를 입력하세요</label>
</div>
<button type="button" class="btn-dark">입력</button>
</div>
<div class="mycards">
<div class="card">
<div class="card-body">
<blockquote class="blockquote mb-0">
<p>넌 할수 있어!</p>
<footer class="blockquote-footer">이순욱 <cite title="Source Title"></cite>
</footer>
</blockquote>
</div>
</div>
<div class="card">
<div class="card-body">
<blockquote class="blockquote mb-0">
<p>아들 항상 믿어!</p>
<footer class="blockquote-footer">강지선 <cite title="Source Title"></cite>
</footer>
</blockquote>
</div>
</div>
<div class="card">
<div class="card-body">
<blockquote class="blockquote mb-0">
<p>여보 힘내! </p>
<footer class="blockquote-footer">김희영 <cite title="Source Title"></cite>
</footer>
</blockquote>
</div>
</div>
</div>
</body>
</html>
