
* 겪고 있는 문제 상황을 최대한 자세하게 작성해주세요.
* 문제 해결을 위해 어떤 시도를 해보았는지 구체적으로 함께 알려주세요.
닉네임박스의 위치와 버튼의 위치가 맞지않는데 맞추는 방법을 알고싶습니다.

작성한 코드 및 에러 메세지
<!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>방명록 작성</title>
</head>
<style>
.mytitle{
width:100%;
height: 250px;
background-image:linear-gradient(0deg, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)) ,url("https://cdnimg.melon.co.kr/cm/album/images/101/00/191/10100191_500.jpg?0e733ba07eeb0fd8a39f04a8eb6291fd");
background-position: center;
background-size: cover;
color:white;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
}
.mypost{
color:gray;
max-width: 500px;
width: 95%;
margin: 20px auto 0px auto;
box-shadow: 0px 0px 3px gray;
padding: 20px;
}
.mypost > button{
margin-top: 15px;
}
.form-floating{
margin: 10px auto 0px auto;
}
.card {
max-width: 500px;
width: 95%;
margin: 20px auto 0px auto;
}
</style>
<body>
<div class="mytitle">
<h1>볼빨간 사춘기 팬명록</h1>
</div>
<div class="mypost">
<div class="form-floating">
<textarea class="form-control" placeholder="Leave a comment here" id="floatingTextarea"></textarea>
<label for="floatingTextarea">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 class='btn'>
<button type="button" class="btn btn-light">응원남기기</button>
</div>
</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 <cite title="Source Title"></cite></footer>
</blockquote>
</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 <cite title="Source Title"></cite></footer>
</blockquote>
</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 <cite title="Source Title"></cite></footer>
</blockquote>
</div>
</div>
</body>
</html>
