
마우스가 올라가면 선이 굵게 만들어지도록 하고 있는데
뭐가 문제일까요? ㅠㅠ

<!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;
color: white;
height: 250px;
width: 100%;
background-image: url("https://movie-phinf.pstatic.net/20210715_95/1626338192428gTnJl_JPEG/movie_image.jpg");
background-position: center;
background-size: cover;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
}
.mytitle > button {
width : 200px;
height: 50px;
background-color: transparent;
color: white;
border-radius: 50px;
border: 1px solid white;
margin-top: 10px;
}
.mytitle > button:hover {
border: 2px solid white;
}
</style>
</head>
<body>
<div class="mytitle">
<h1> 내 생의 최고의 영화들 </h1>
<button> 영화 기록하기 </button>
</div>
</body>
</html>
